Which two factors would prevent you from moving the disks from one Exadata storage server to another one?

To troubleshoot a possible hardware problem, you consider moving all disk drives from oneExadata storage server to a replacement chassis.You must contain storage availability while performing task.The Exadata storage server is an X3-8 Database Machine and storage grid is not partitioned.Which two factors would prevent you from moving the disks from one Exadata storage server toanother one?

A.The existence of an external redundancy ASM diskgroup

B.The existence of a normal redundancy ASM diskgroup

C.The existence of an ASM diskgroup with the repair_time attribute set to 0.

D.The existence of an ASM diskgroup with its compatible.asm attribute set to 10.2.0.0.0

E.Offline or inactive celldisks in another Exadata server

Explanation:A:If you want Oracle ASM to mirror files, specify the redundancy level as NORMALREDUNDANCY (2-way mirroring by default for most file types) or HIGH REDUNDANCY (3-waymirroring for all files). You specify EXTERNAL REDUNDANCY if you do not want mirroring byOracle ASM. For example, you might choose EXTERNAL REDUNDANCY if you want to usestorage array protection features.D:Restoring the redundancy of an Oracle ASM disk group after a transient disk path failure can betime consuming. This is especially true if the recovery process requires rebuilding an entire OracleASM failure group. Oracle ASM fast mirror resync significantly reduces the time to resynchronize afailed disk in such situations. When you replace the failed disk, Oracle ASM can quicklyresynchronize the Oracle ASM disk extents.To use this feature, the disk group compatibility attributes must be set to 11.1 or higher.Incorrect:Not C:You can set the DISK_REPAIR_TIME disk group attribute to delay the drop operation byspecifying a time interval to repair the disk and bring it back online. Note:*The redundancy levels are:/External redundancy

Oracle ASM does not provide mirroring redundancy and relies on the storage system to provideRAID functionality. Any write error cause a forced dismount of the disk group. All disks must belocated to successfully mount the disk group./Normal redundancyOracle ASM provides two-way mirroring by default, which means that all files are mirrored so thatthere are two copies of every extent. A loss of one Oracle ASM disk is tolerated. You canoptionally choose three-way or unprotected mirroring./High redundancy

Oracle ASM provides triple mirroring by default. A loss of two Oracle ASM disks in different failuregroups is tolerated.Reference: Administering Oracle ASM Disk Groups

Which two are regarding the case of storage indexes?

Posted by seenagape on September 23, 2013 8 comments

Which two are regarding the case of storage indexes?

A.To increase the chance of using the a storage index, you can make table indexes invisible.

B.To maximize the benefit of storage Indexes, load your data stored on the filtered columns.

C.The cell physical 10 bytes saved by storage index statistic returns multiple rows, one for each storage server.

D.Storage indexes are retained after a cell is rebooted.

E.Avoid the use of bind variables because Storage Indexes do not work with bind variables.

Explanation:B:* To use storage indexes, Oracle Exadata queries must use smart scans, so notall types of applications can benefit from storage indexes.*With Exadata storage, database operations are handled much more efficiently. Queries thatperform table scans can be processed within Exadata storage with only the required subset ofdata returned to the database server. Row filtering, column filtering and some join processing(among other functions) are performed within the Exadata storage cells. When this takes placeonly the relevant and required data is returned to the database server.Incorrect:

Not D:Storage indexes reside in the memory of the storage servers.If a storage cell is shutdown or rebooted the storage index will be lost from memory and will berecreated on subsequent accesses to the data after the cell has been brought back online.

which QoS Management can generate recommendation?

Posted by seenagape on September 23, 2013 9 comments

Identity the resource bottleneck for which QoS Management can generate recommendation?

A.CPU resource bottlenecks

B.Global Cache resource bottlenecks

C.I/O resource bottlenecks

D.Network resource bottlenecks

Explanation:Note:*Oracle Exadata QoS Management provides the following benefits:• Reduces the time and expertise requirements for system administrators who manage OracleReal Application Clusters (Oracle RAC) resources• Helps reduce the number of performance outages• Reduces the time needed to resolve problems that limit or decrease the performance of yourapplications• Provides stability to the system as the workloads change• Makes the addition or removal of servers transparent to applications• Reduces the impact on the system caused by server failures• Helps ensure that service-level agreements (SLAs) are met• Enables more effective sharing of hardware resources• Protects existing workloads from over committed memory-induced server failures• Exadata Storage Virtualization• Exadata provides a rich set of sophisticated and powerful storage management virtualizationcapabilities that leverage the strengths of the Oracle Database, the Exadata software, andExadata hardware.*When QoS Management is enabled, individual Exadata nodes are protected frommemory related failures. The Memory Guard features tracks real-time memory useand should it detect a node has over-committed memory, will prevent new databaserequests from being sent until the current load is relieved

Which two are Oracle recommendations for media based backups performed for a database running on a Database Machine?

Posted by seenagape on September 23, 2013 9 comments

Which two are Oracle recommendations for media based backups performed for a databaserunning on a Database Machine?

A.Allocate equivalent number of channels and instances per tape drive.

B.Perform periodic level 0 backups and daily cumulative level-1 backups.

C.Use the InfiniBand network between the database server and media server.

D.Configure Recovery Manager (RMAN) channels to connect to the least loaded instances.

E.UseInfiniBand network between the media server and the storage servers.

Explanation:A:Configure one RMAN channel per tape drive and add tape drives to scale backup rates.C:Configure the Preferred Network Interface (PNI) to direct the Oracle Secure Backuptraffic over the InfiniBand network interface.Example:ob> lspni (List Preferred Network Interface)mediaserver1:PNI 1:

interface: mediaserver1-ibclients: dbnode1, dbnode2, dbnode3, dbnode4,dbnode5, dbnode6, dbnode7, dbnode8PNI 2:interface: mediaserver1clients: adminserverdbnode1:PNI 1:interface: dbnode1-ibclients: mediaserver1Note:*Using the Sun ZFS Backup Appliance as an Oracle RMAN backup target for an Oracle Exadatasystem delivers much faster backup and recovery, enabling organizations to achieveshorterrecovery time objectives and shrink backup windows. The appliance is designed for high sustainedread and write I/O performance, and it is connected to the Oracle Exadata system via a highthroughput InfiniBand network fabric.*As the only unified storage vendor to support InfiniBand as a storage network for backup andrestore operations, Oracle is leading the way with nativehigh-bandwidth interconnects.

*The InfiniBand network provides 40 Gb of bandwidth per port between the database servers,storage cells, and the Sun ZFS Backup Appliance. Backup and restore operations can beautomatically parallelized across all database nodes, Oracle Exadata storage cells, Sun ZFSBackup Appliance channels, and controllers.

What is the benefit of bonding the client access network configuration?

Posted by seenagape on September 23, 2013 9 comments

What is the benefit of bonding the client access network configuration?

A.Improved performance

B.Improved reliability

C.Both improved performance and reliability

D.A Single Client Access Name (SCAN)

E.Improved monitoring

Explanation:The network ports can be connected directly between the components or the portscan be bondedtogether to form a logical interface. The bonded ports can be configured for load balancing, faulttolerance, and better network utilizationReference:Oracle Exadata Database Machine -Backup & Recovery Sizing:Tape Backups

Where, in relation to the cabinet, should they be placed?

Posted by seenagape on September 23, 2013 1 comment

To guarantee proper cooling, you plan to place perforated floor tiles near your Database Machine.Where, in relation to the cabinet, should they be placed?

A.On the left side, because the air flow is from left to right

B.At the back, because the air flow is from back to front

C.On the right side, because the air flow is from right to left.

D.At the front, because the air flow is from front to back

E.Underneath the cabinet, because the air flow is from bottom to top

Explanation:Airflow must be front-to-back.

Reference: Oracle White Paper,ORACLE Exadata DatabaseMachine X3-8

Identify two valid reasons for creating multiple griddisks on a Single celldisk.

Posted by seenagape on September 23, 2013 4 comments

Identify two valid reasons for creating multiple griddisks on a Single celldisk.

A.To segregate storage into multiple pools with different performance characteristics

B.To facilitate normal or high redundancy ASM diskgroups

C.To enable disk mirroring for the system area

D.To segregate storage into multiple pools that can be assigned to different databases

E.To segregate storage into multiple pools that can be assigned to different resource consumer groups in the same database.

Explanation:Creating multiple grid disks per cell disk allows you to create multiple pools ofstorage on the same Exadata Storage Server.The multiple grid disks can be assigned to separateASM diskgroups, which can be provisioned to different databases.Note:*Celldisks are the third layer of abstraction. It was introduced to enable interleaving in the firstplace*Griddisks are the fourth layer of abstraction, and they will be the Candidate Disks to build yourASM diskgroups from.* The first grid disk created on the cell disk will allocate space from the outer tracks and movetowards the inner tracks, reserving the number of tracks that correspond to the size of the griddisk.This grid disk provides the fastest performance since the outer tracks of a hard disk provide

the best read/write performance.The next grid disk you will create starts from the tracks where thefirst grid disk ends, and this process repeats until you exhaust all the space on the cell disk or youare done creating the grid disks.

Which two are supported migration methods?

Posted by seenagape on September 23, 2013 10 comments

You plan to migrate an Oracle database that supports an online transaction processing (OLTP)workload to your Database Machine.Following are details for the source database:

Database version: 10.2.0Byte order: Big Endian HP-UX (64-bit)Database size: 24 TBStorage: ASM with 1 MB allocation unit sizeWhich two are supported migration methods?

A.Physical migration using ASM online Migration

B.Physical migration using Transportable Database

C.Logical migration using Oracle Streams

D.Local migration using Oracle Streams

E.Logical migration using logical standby

Explanation:Note:* physical migration techniques (e.g. Data Guard Physical Standby, Transportable Database,Transportable Tablespaces(B), Rapid Clone) vs. logical migration techniques(C)(e.g. Oracle DataPump).*You can use either Data Pump export/import or original export/import for Streams instantiations.*The Oracle Exadata Database Machine runs the standard Oracle Database. Therefore, anyapplication that runs with the Oracle Database today can be seamlessly migrated to the ExadataDatabase Machine with no changes to the application.*There are several techniques for migrating data to a Database Machine. Migration can be doneusing Oracle Recovery Manager (RMAN) to backup from traditional storage and restore the dataonto Exadata. Oracle Data Guard can also be used to facilitate a migration. This is done by firstcreating a standby database based on Exadata storage. The standby can be using Exadatastorageand the production database can be on traditional storage. By executing a fast switchover, takingjust seconds, you can transform the standby database into the production database. This providesa built-in safety net as you can undo the migration very gracefully if unforeseen issues arise.Transportable Tablespaces(B)and Data Pump may also be used to migrate to Exadata. Anytechnique used to move data between Oracle Databases can be used with Exadata.

which Enterprise manager agents must be deployed in order to monitor all components of the multi-rack Database Machine?

Posted by seenagape on September 23, 2013 1 comment

You have configured a multi-rack Database Machine with two X3-8 full racks all in a single clusterand storage grid.Which two are true regarding the servers on which Enterprise manager agents must be deployedin order to monitor all components of the multi-rack Database Machine?

A.On only one database server in the first rack

B.On all storage servers in all racks

C.On at least two storage servers in the first rack

D.On all database servers in thefirstrack

E.On only one database server in second rack

F.On all database servers in second rack

G.On at least two storage servers in the second rack

Explanation:Note:*The Enterprise Manager agent must be deployed to all compute nodes of the Database Machine.*Oracle’s documentation uses the term compute node when referring to the database server tier ofthe platform.*The Exadata Database Machine runs Oracle Database 11g Real Application Cluster. The clusterand the database run on the servers known as database nodes or compute nodes (or simply“nodes”).*Cells and compute nodes are not shared between partitions.*Compute nodes in same partition share the same Cluster.

Which three storage components are available after the standard initial Database machine deployment?

Posted by seenagape on September 23, 2013 15 comments

Which three storage components are available after the standard initial Database machinedeployment?

A.The DATA_<DBM_Name> ASM diskgroup

B.The RECO_<DBM_Name> ASM diskgroup

C.Mirrored system partitions on hard disk 0 and hard disk 1

D.The DBFS_DG diskgroup with external redundancy

E.Exadata Smart Flash Cache using all of the flashdisk space

Explanation:The default configuration on Exadata is to have 3 diskgroups – DATA, RECO, andDBFS_DG.

Identify the six steps you must perform to replace flashdisk.

Posted by seenagape on September 23, 2013 7 comments

Yesterday, an Exadata storage server flashdisk entered the poor performance state.This flashdisk os used by flashcache and has a griddisk which is a member of a normalredundancy diskgroup.Identify the six steps you must perform to replace flashdisk.

A.Identify the griddisk located on the poorly performing flashdisk and drop it from the associated ASm diskgroup.

B.Verify that the griddisk located on the poorly performing flashdisk has been successfully dropped from the associated ASM diskgroup.

C.Drop the flashcache on all cell.

D.Safely power off the cell containing the poorly-performing flashdisk.

E.Replace the poorly performing flashdisk.

F.Power up the cell containing the replaced flashdisk and activate all griddisks.

G.Recreate the flashcache on the cell using all flashdisks.

H.Create a new griddisk on the replaced flashdisk.

I.Add the griddisk back into the ASM diskgroup to which it belonged.

Explanation:Note:*The default way to deal with the Flash Storage is to use it completely as Flash Cache. You maythink of Flash Cache as a prolongation of the Database Buffer Cache. It is populated automaticallyby the system with objects deemed useful to cache them.*The second possibility to deal with the Flash Storage is to take a part of it for building ASMdiskgroups upon. All files on these ASM diskgroups will then reside permanently on Flash Storage:CellCLI> drop flashcacheFlash cache exa5cel01_FLASHCACHE successfully droppedCellCLI> create flashcache all size=100g

Flash cache exa5cel01_FLASHCACHE successfully createdCellCLI> create griddisk all flashdisk prefix=flashdrive

Which two actions could improve performance in these areas?

Posted by seenagape on September 23, 2013 13 comments

You recently upgraded your Exadata image to the latest release; previously you were using11.2.0.3.At the same time, you decide to address some performance problems as follows:You noticed increased latency for the database log writer, especially during the quarterly batterylearn cycle on the cells.You have complaints of erratic performance from certain write-intensive applications.Which two actions could improve performance in these areas?

A.Enable write-back flashcache by setting lunWriteCacheMode to Write Back Mode.

B.Use ALTER TABLE in the database to set CELL_FLASH_CACHE = KEEP for the tables belonging to the affected application.

C.Configure Smart Flash Log on the cells to use some of these of the space on the cell flash devices.

D.Configure the table belonging to the affected application using CELLCLI, to the set CELL_FLASH_CACHE = KEEP.

E.Configure Smart Flash Log on the database server to use server flash memory.

Explanation:B: The following command could be used to pin the table CUSTOMERS in ExadataSmart Flash CacheALTER TABLE customers STORAGE (CELL_FLASH_CACHE KEEP)C:Creating Flash Disks Out Of The Flash CacheWhen an Exadata cell is installed, by default, all the flash is assigned to be used as flash cacheanduser data is automatically cached using the default caching behavior. Optionally, a portion of thecache can be reserved and used as logical flash disks. These flash disks are treated like anyExadata cell disk in the Exadata cell except they actually reside and are stored as non-volatiledisks in the cache.

Note:*Pinning Objects In The Flash CachePreferential treatment over which database objects are cached is also provided with the ExadataSmart Flash Cache. For example, objects can be pinned in the cache and always be cached, oranobject can be identified as one which should never be cached. This control is provided by thenew storage clause attribute, CELL_FLASH_CACHE, which can be assigned to a database table,index, partition and LOB column*There are two techniques provided to manually use and manage the cache. The first enables the

pinning of objects in the flash cache. The second supports the creation of logical disks out of theflash for the permanent placement of objects on flash disks.

Which two statements are true about the use of direct path loads when selecting from external tables in a database on a Database Machine?

Posted by seenagape on September 23, 2013 1 comment

Which two statements are true about the use of direct path loads when selecting from externaltables in a database on a Database Machine?

A.INSERT INTO . . . SELECT FROM statements, executed serially,whichselect from external tables, require the APPEND hint to use direct path loading.

B.CREATE TABLE . . . AS SELECT statements, which select from external tables, attempt to use in direct path loading automatically.

C.CREATE TABLE . . . AS SELECT statements, which select from external tables, require the APPEND hint to use direct path loading.

D.INSERT INTO . . . SELECT FROM statements, executed serially, which select from external tables, are unable to use direct path loading.

Explanation:A CTAS(Create table as select)will always use direct path(B, not C)load butIAS(Insert as select)statement will not. In order to achieve direct path load with an IAS statementyou must add the APPEND hint to the command(A, not D).Direct path loads can also run in parallel. You can set the parallel degree for a direct path loadeither by adding the PARALLEL hint to the CTAS or IAS statement or by setting thePARALLEL clause on both the external table and the table into which the data will be loaded.Once the parallel degree has been set at CTAS will automatically do direct path load in parallelbut an IAS will not. In order to enable an IAS to do direct path load in parallel you must alterthe session to enable parallel DML.Note:

*Parallel Direct Path LoadThe key to good load performance is to use direct path loads wherever possible. A direct pathload parses the input data according to the description given in the external table definition,converts the data for each input field to its corresponding Oracle data type, then builds a columnarray structure for the data. These column array structures are used to format Oracle data blocksand build index keys. The newly formatted database blocks are then written directly to thedatabase, bypassing the standard SQL processing engine and the database buffer cache.Reference:Best Practices for Implementing a Data Warehouse on the Oracle Exadata DatabaseMachine;Using CTAS & Exchange Partition Replace IAS for Copying Partition on Exadata

What must be done to achieve this?

Posted by seenagape on September 23, 2013 5 comments

Your customer wants you to partition the database and storage grids in his X3-2 full rack, creatingdatabase clusters and two storage grids.One cluster will be used for production and should consist of 6 databases servers and 11 cells

from the first storage grid.The other cluster will be used for test and development, and should consist of 2 database serversand 3 cells from the second storage grid.The storage must be partitioned so that the cells are visible only to the appropriate databaseservers based on the description above.What must be done to achieve this?

A.Configure Exadata realms using Oracle ASM scoped security mode.

B.Configure Exadata realms using Database scoped security mode.

C.Edit the CELLIP.ORA file on each database server to contain IP addresses of cells in the storage grid associated with cluster to which that database server belongs.

D.Edit the CELLINIT.ORA file on each database server to contain IP addresses of cells in the storage grid associated with the cluster to which that database server belongs.

E.Edit the CELLIP.ORA file on each database server to contain IP addresses of database servers which are allowed access to specific cells in the same storage grid.

F.Edit the CELLIP.ORA file on each cell to contain IP addresses of database servers in the database server grid that are associated with the storage grid to which that cell belongs.

Explanation:cellip.oraThe cellip.ora is the configuration file, on every compute node, that tells ASM instances which cellsare available to this cluster.Here is a content of a typical cellip.ora file for a quarter rack system:$ cat /etc/oracle/cell/network-config/cellip.oracell=”192.168.10.3″cell=”192.168.10.4″cell=”192.168.10.5″Now that we see what is in the cellip.ora, the grid disk path, in the examples above, should makemore sense.Note:*cellinit.ora decides which network takes storage traffic.*cellip.ora – list of cells, new cells can be added dynamically without shutdown

Which three statements are true about the initial storage configuration after the standard deployment of a new database Machine?

Posted by seenagape on September 23, 2013 4 comments

Which three statements are true about the initial storage configuration after the standarddeployment of a new database Machine?

A.The Data_<DBM_Name> and RECO_<DBM_Name> ASM diskgroups are built on part of the interleaved griddisks.

B.The Data_<DBM_Name> and RECO_<DBM_Name> ASM diskgroups are built on top of the non-interleaved griddisks.

C.There is a free space available on the hard disks inside the database servers for possible extension of the /u01 file system.

D.There is no free disk space available on the hard disk inside the database servers for possible extensions of the /u01 file system.

E.There is free space available on the flashdisk inside the Exadata storage servers for possibleuseas flash-based griddisks.

F.There isnofree disk available on the flashdisk inside the Exadata storage servers forpossible use as flash-based griddisks.

Explanation:B( not A): Griddisks are the fourth layer of abstraction, and they will be theCandidate Disks to build your ASM diskgroups from. By default (interleaving=none on the Celldisklayer), the firstGriddisk that is created upon a Celldisk is placed on the outer sectors of theunderlying Harddisk. It will have the best performance therefore. If we follow therecommendations, we will create 3 Diskgroups upon our Griddisks: DATA, RECO andSYSTEMDG.Note:*non-rootpartition (/u01).*Oracle Database files: DATA disk group.*Flashback log files, archived redo files, and backup files: RECO disk group.

Which three components require external Ethernet network cables to connect your existing network infrastructure to your database machine to satisfy this requirement?

Posted by seenagape on September 23, 2013 3 comments

You are in the planning stage of the network configuration for your Database Machine. Therequirements are:1. A fault-tolerant network, providing higher availability for connections to database instances2. Fault tolerance providing higher availability for connections to perform management functionson the database and storage servers.3. Full monitoring of all Database Machine components using Enterprise ManagerWhich three components require external Ethernet network cables to connect your existingnetwork infrastructure to your database machine to satisfy this requirement?

A.Database servers

B.Exadata storage servers

C.InfiniBand storage servers.

D.Power distribution units (PDUs)

E.Cisco Ethernet switch

Identify two permitted uses of external InfiniBand connections to a Database Machine.

Posted by seenagape on September 23, 2013 8 comments

Identify two permitted uses of external InfiniBand connections to a Database Machine.

A.To connect an ExaLogicElastic CloudMachine

B.To monitor the InfiniBand network using Enterprise Manager

C.To connect an external tape library

D.To use a bonded client access network

E.To use a bonded management network

Explanation:A:Combining the Oracle Exalogic Elastic Cloud withthe Oracle Exadata DatabaseMachine for SAPNetWeaverThe InfiniBand fabric that spans Exalogic and Exadatacomponents provides the following key ways ofsimplifying and accelerating SAP NetWeaver installations running on ExalogicNote:A highspecialized database networking protocols connects all the components insideanExadata Database Machine. External connectivity to the Exadata Database Machineis providedthrough standard 1 Gigabit and 10 GigabMultiple X3even larger configurations.

which two reasons would the; “physical read total bytes” statistic be greater than the “cell physical IO bytes eligible for predicate offload” statistic?

Posted by seenagape on September 23, 2013 12 comments

You are evaluating the performance of a SQL statement that accesses a very large table, andhave run the following query producing the output shown:

For which two reasons would the; “physical read total bytes” statistic be greater than the “cellphysical IO bytes eligible for predicate offload” statistic?

A.There is an index on the column used in the where clause, causing “cell multiblock physical reads” to be requested by the database instance, resulting in additional I/O for blocks in the cells.

B.The table is an IOT and has an overflow segment, causing “cell multiblock physical reads” to be requested by the database instance, resulting in additional I/O for block in the cells.

C.There is an uncommitted transaction that has modified some of the table blocks, causing some “cell single block physical reads” to be requested by the database instance, resulting in additional I/O for block in the cells.

D.The table is an indexed clustered table, causing “cell single block physical reads” to be requested by the database instance, resulting in additional I/O forblocks in the cells.

E.There are migrated rows in the table, causing some “cell single block physical reads” to be requested by the database instance, resulting in additional I/O for blocks in the cells.

Explanation:Note:* physical read total bytes: the size of the segment to read is known by the database, and must beread entirely from the database’s perspective.*cell physical IO bytes eligible for predicate offload: this statistic shows the amount of data whichthe cell server is able to process on behalf of the database, instead of the database processingand the cell server just delivering blocks.*Cell physical IO bytes eligible for predicate offload — This number should be highThe higher the number more MB/GB is filtered out at the cell level itself rather sending it to thebuffer cache to filter the rows.

*In this case, all bytes are processed on the cellserver (cell physical IO bytes eligible for predicateoffload=physical read total bytes)*Cell Offloading:-The storage cells are intelligent enough to process some workload inside them, saving thedatabase nodes from that work. This process is referred to as cell offloading.

Which two are true concerning oplan?

Posted by seenagape on September 23, 2013 3 comments

You must apply patches and patch bundles in a rolling fashion, if possible, on the components ofyour Database Machine.You use RAC for your database and also use Data Guard, having standby database on anotherDatabase Machine.You wish to have scripts that contain the appropriate command to patch your environment.Your patch bundle is on the first database server and is located at /u01/stage.You have downloaded the oplan utility to the first database server and run the following:

$ORACLE_HOME/oplan/oplangenerateApplySteps /u01/stageWhich two are true concerning oplan?

A.It will generate instructions for patching only storage servers.

B.It will generate instructions for patching all the components on the Database Machine.

C.It will generate instructions for patching the RAC Oracle Home on the primary location.

D.It will generate instructions for patching the Data Guard environment on the standby location.

E.It will generate instructions for patching the Grid Infrastructure home on the primary location.

Explanation:Oplan generates instructions for all of the nodes in the cluster.Note:*Oplan is a utility that facilitates you with the application of bundle patches on Exadata computenodes via Opatch. This new utility helps you with the patch process by generating step-by-stepinstructions telling you how to apply a bundle patch in your environment.*Exadata is much more than a “database-in-a-box.” It is a set of compute nodes (think RAC nodeservers) combined with ultra-fast infiniband (…and 10GB ethernet, and multiple 1GB ethernet) andstorage nodes.Incorrect:Not D:There is no support for Oracle DataGuard

Diskmon Identify the location where these software components may run in the standard Database machine deployment.

Posted by seenagape on September 23, 2013 9 comments

Consider the following list of software components:1. DCLI2. Management Server (MS)3. ASM Instance

4. RDBMS instance5. Restart Server (RS)6. Cellcli7. Cell Server (CELLSRV)

8. DiskmonIdentify the location where these software components may run in the standard Database machinedeployment.

A.3, 4 and 8 run on the database servers; 1, 2, 5, 6 and 7 run on the Exadata Storage servers.

B.4 and 8 run on the database servers; 1, 2, 3, 5, 6 and 7 run on the Exadata Storage servers.

C.1, 3 and 4 run on the database servers; 2, 5, 6, 7 and 8 run on the Exadata Storage servers.

D.3, 4 and 8 run on the database servers; 1, 2, 5, 6 and 7 run on the Exadata Storage servers.

E.3, 4 and 8 run on the database servers; 1, 2, 5, 7 and 8 run on the Exadata Storage servers.

F.1, 3, 4 and 8 run on the database servers; 1, 2, 5, 7 and 8 run on the Exadata Storage servers.

Explanation:* (not C or notF):Exalogic includes a tool called DCLI (Distributed Command LineInterface) that can be used to run the same commands on all or a subset of compute nodes inparallel.* Cellcli(not E): on Exadata Storage Servers.* RDBMS instance on database server.*CELLSRVon Exadata Storage Servers.* ASM on Exadata Storage Servers(not D)After an Oracle ASM instance has been installed on a single-instance Oracle Database or in anOracle Real Application Clusters (Oracle RAC) environment, the final Oracle ASM configurationcan be performed.

Which two types if metrics would help assess the impact of the intra-database plans on I/O to the storage servers?

Posted by seenagape on September 23, 2013 3 comments

You plan to monitor storage servers after configuring an I/O resource manager plan with directivesfor inter-database plans and intra-database plans.Which two types if metrics would help assess the impact of the intra-database plans on I/O to thestorage servers?

A.Category I/O

B.Database I/O

C.Resource Consumer Group I/O

D.Smart Flash Log I/O

E.Smart Flash Cache I/O

Explanation:B:Database metrics provide information about the size of the I/O load from each

database specified in the interdatabase plan. C:Consumer group metrics provide information about the size of the I/O load from each consumergroup specified in a database resource plan. Each database in the interdatabase plan has metricsfor each of its consumer groups.Note:*I/O Resource Manager (IROM) SettingsIncorrect:Not A:Category metrics provide information about the size of the I/O load from each categoryspecified in the current IORM category plan.

Which two are true regarding the configuration used to support this?

Posted by seenagape on September 23, 2013 2 comments

You configuring has two half racks, one with high capacity disks and other with high performancedisks and high capacity expansion half rack.There are two RAC clusters, one on each half rack, which have separate storage grids, eachconsisting of some of the storage servers in the configuration.You are planning your deployment of Enterprise Manager to monitor all the components of thismulti-rack Database Machine, and must provide for high availability of the monitoringinfrastructure.If the host running the agent which has database machine targets bound to it fails, the monitoringof these targets must be another agent.Which two are true regarding the configuration used to support this?

A.Enterprise manager support must be deployed to only one Enterprise Manager Agent in each cluster.

B.A secondary agent must be deployed on a database server in the same cluster as the server hosting the primary agent.

C.Enterprise Manager support must be deployed to all Enterprise Manager Agents in each cluster.

D.A secondary agent may be deployed on a database server in a different cluster than the server hosting the primary agent.

E.A secondary agent must be deployed on a database server in a different cluster than the server hosting the primary agent.

F.Enterprise Manager support must be deployed to at leasttwoEnterprise Manager Agents in each of the two RAC clusters.

Explanation:Note:*Instructions for configuring a high availability solution for the Exadata Storage cell orany otherExadata plug-in are documented in the Oracle Database Machine Monitoring Best Practices (DocID 1110675.1) document located in My Oracle Support*High Availability for Plug-InsNormally a plug-in target is bound to a specific agentIf the agent is down the target cannot be monitoredA procedure exists to facilitate target failover to a secondary agent*The Enterprise Manager agent must be deployed to all compute nodes of the Exadata DatabaseMachine.*The Oracle ILOM plug-in monitors the Oracle ILOM service processor in acompute node for hardware events and records sensor data to the OracleEnterprise Manager Repository.The ILOM plug-in is deployed to the Enterprise Manager (EM) Agent on the firstcompute node in an Oracle Database Machine, and only that EM agentcommunicates with the EM Management Server and Repository for all ILOMdatabase server service processors in the Oracle Database Machine.*OEM Agent and Exadata Plug-ins1. OEM Agent and Plug-Insare deployed under OracleHome2. Agent incorporatesadditional functionality inPlug-In3. Agent and Plug-inDB Server on Exadata DBM3. Agent and Plug-incommunicates withStorage Server4. Plug-Ins are available formonitoring all Exadatahardware components5. OEM Agent communicates

with the OEM

The following task might be performed:

Posted by seenagape on September 23, 2013 8 comments

You are about to run the oplan utility to patch the servers on your test Database Machine beforepatching the production environment.The following task might be performed:

A.Test the failback procedure

B.Run the exachk utility

C.Read the README file.

D.Automate the patch application process as appropriate.

E.Verify that the patch provides the functionality it is meant to.

F.Apply the patch.

G.Evaluate the system performance. In which order should the tasks be performed to patch in the recommended fashion?

H.C, B, D, F, B, E, A

I.C, D, F, B, E, G, A, B

J.C, B, D, F, E, G, A K. C, B, D, F, E, A, G L. C, B, D, F, B, E, G, A

Explanation:Note:*Schedule regular health checks with Exachk– Detects bad disks, faulty hardware, incorrect configuration– At least every 90 days– Before and after patching/upgrades– Follow recommended best practices*we are recommending running exachk or Healthcheck (depending on your DBM/Exadata model)*before* maintenance and *after* maintenance.

which have more balanced performance characteristics?

Posted by seenagape on September 23, 2013 12 comments

Which two may act as building blocks for the creation of two or more griddisks residing on thesame physical device and which have more balanced performance characteristics?

A.griddisk on hard drive-based intervleaved celldisks.

B.griddisk on hard drive-based celldisks consumed by ASM when creating diskgroups using ASM-based intelligent Data Placement (IDP)

C.griddisk on hard drive-based non-interleaved celldisks.

D.griddisk on Flash-base celldisks.

Explanation:A (not C):Interleaved Griddisks mean equally fast Griddisks, whereas with nonInterleaved Griddisks (the default) the Griddisks created first are being taken from the outer tracksof the underlying physical disk.B:Intelligent Data Placement, a feature of ASM that allows placing data in such a way that morefrequently accessed data is located close to the periphery of the disk where the access is faster.

Which type of network traffic is transported over the internal InfiniBand network in a Database Machine?

Posted by seenagape on September 23, 2013 10 comments

Which type of network traffic is transported over the internal InfiniBand network in a DatabaseMachine?

A.IDB protocol traffic only

B.Both Clustered ASM and RAC database instance traffic

C.Clustered ASM Instance traffic only

D.RAC database instance traffic only

E.IDB protocol traffic,Clustered ASM traffic, and RAC database instance traffic

Explanation:The Exadata software is optimally divided between the database servers andExadatacells. The database servers and Exadata Storage Server Software communicate using the iDB –the Intelligent Database protocol. iDB is implemented in the database kernel and transparentlymaps database operations to Exadata-enhanced operations. iDB implements a function shippingarchitecture in addition to the traditional data block shipping provided by the database. iDB isused to ship SQL operations down to the Exadata cells for execution and to return query resultsets to the database kernel. Instead of returning database blocks, Exadata cells return only therows and columns that satisfy the SQL query. Like existing I/O protocols, iDB can also directlyread and write ranges of bytes to and from disk so when offload processing is not possibleExadata operates like a traditional storage device for the Oracle Database. But when feasible, theintelligence in the database kernel enables, for example, table scans to be passed down toexecute

on the Exadata Storage Server so only requested data is returned to the database server.iDB is built on the industry standard Reliable Datagram Sockets (RDSv3) protocol and runs overInfiniBand. ZDP (Zero-loss Zero-copy Datagram Protocol), a zero-copy implementation ofRDS, is used to eliminate unnecessary copying of blocks. Multiple network interfaces can be usedon the database servers and Exadata cells. This is an extremely fast low-latency protocol thatminimizes the number of data copies required to service I/O operations.

Note:*The Database Machine uses a state of the art InfiniBand interconnect between the servers andstorage. Each database server and Exadata cell has dual port Quad Data Rate (QDR) InfiniBandconnectivity for high availability.*The same InfiniBand network also provides a high performance clusterinterconnect for the Oracle Database Real Application Cluster (RAC) nodes.Note:*An InfiniBand network allows you to connect multiple Oracle Exadata Database Machines to forma larger single system image configuration; each InfiniBand link provides 40 Gigabits ofbandwidth–many times higher than traditional storage or server networks

which two locations should files be staged, to be loaded using external tables into a database on a Database Machine?

Posted by seenagape on September 23, 2013 8 comments

In which two locations should files be staged, to be loaded using external tables into a databaseon a Database Machine?

A.On a dbfs file system stored in a staging database on the Database Machine

B.On an Exadata-based ACFS file system on the Database Machine

C.On an nfs file system mounted on a database server where the external table will be accessed.

D.On local storage on one or more cells that are accessible to the database server where the load will be performed.

Explanation:Prepare a Temporary File SystemThe Oracle E-Business Suite Rapid Install creates a file system based Oracle Database release11.1.0.7 database, and it cannot install directly to a database that uses Oracle ASM. Therefore itrequires non-Exadata storage of about 55 GB and an additional 50 GB of storage for the installstaging area for a total of 105 GB. The file system to be used for the database node file systemand the stage area can either use the database machine local storage or an NFS mounted filesystem.

Reference:Installing Oracle E-Business Suite Release 12 with the Oracle Exadata DatabaseMachine

Which tool will provide you with diagnostic information for all the software log, trace files, and OS information on Database Machine?

Posted by seenagape on September 23, 2013 3 comments

Which tool will provide you with diagnostic information for all the software log, trace files, and OSinformation on Database Machine?

A.dbmcheck.sh

B.diagget.sh

C.oswatcher

D.adrci

E.Enterprise Manager

Explanation:Gather all diagnostics information/opt/oracle.SupportTools/onecommand/diagget.sh

Which three are true about Smart Flash log?

Posted by seenagape on September 23, 2013 3 comments

Which three are true about Smart Flash log?

A.I/O Resource Manager database plans can be used to enable or disable Smart Flash Log for different databases.

B.LGWR will not wait for writes to Smart Flash log if the write to a disk based logfile completes first.

C.Smart Flash Log is enabled by default, using 1024 MB of Rash storage on each storage server.

D.You can remove Smart Flash Log from a single storage server with the drop flashing command.

E.I/O Manager category plans can be used to enable or disable Smart Flash LogFor different I/O categories.

Explanation:A:the Exadata I/O Resource Manager (IORM) has been enhanced to enable ordisable Smart Flash Logging for the different databases running on the Database Machine.B: Smart Flash Logging works as follows. When receiving a redo log write request, Exadata will doparallel writes to the on-disk redo logs as well as a small amount of space reserved in the flashhardware. When either of these writes has successfully completed the database will be

immediately notified of completion. If the disk drives hosting the logs experience slow responsetimes, then the Exadata Smart Flash Cache will provide a faster log write response time.Conversely, if the Exadata Smart Flash Cache is temporarily experiencing slow response times(e.g., due to wear leveling algorithms), then the disk drive will provide a faster response time.This algorithm will significantly smooth out redo write response times and provide overall betterdatabase performance.D: Category plans are configured and enabled using the CellCLI utility on the cell. Only onecategory plan can be enabled at a time

Incorrect:Not C:By default, 512 MB of the Exadata flash is allocated to Smart Flash Logging

which servers must be modified after connecting an Exadata storage full expansion rack to your X3-2 Exadata Database Machine…?

Posted by seenagape on September 23, 2013 2 comments

You have a partitioned database grid on an X3-2 full rack with two four-node RAC clusters calledCLUSA and CLUSB. The storage grid, however, has not been partitioned.Which files on which servers must be modified after connecting an Exadata storage full expansionrack to your X3-2 Exadata Database Machine on the InfiniBand network so that the cells on theexpansion rack are added to the storage grid?

A.The CELLINIT.ORA files on database servers in CLUSA

B.The CELLIP.ORA files on the database servers in CLUSA

C.The CELLINIT.ORA files on the database servers in CLUSB

D.The CELLIP.ORA files on all existing and newly added Exadata storage servers.

E.The CELLIP.ORA files on the database servers in CLUSB

Explanation:Note:*cellinit.ora, cellip.ora— on database servercellinit.ora – identifies the storage network interface on the database servercat /etc/oracle/cell/network-config/cellinit.oracellip.ora – identifies the Exadata cells that are accessible to the database servercat /etc/oracle/cell/network-config/cellip.ora*The cellip.ora is the configuration file, on every compute node, that tells ASM instances which

cells are available to this cluster.Here is a content of a typical cellip.ora file for a quarter rack system:$ cat /etc/oracle/cell/network-config/cellip.oracell=”192.168.10.3″cell=”192.168.10.4″cell=”192.168.10.5″

Which two are true about Exadata storage server alerts?

Posted by seenagape on September 23, 2013 6 comments

Which two are true about Exadata storage server alerts?

A.Metric alerts are never stateful.

B.Metrics have no thresholds set on them by default.

C.SNMP alert notifications can be sent to only one destination.

D.Metric threshold; if set, will persist across storage server reboots.

E.SMTP alert notifications must be sent to both ASR manager and Enterprise Manager Agents

Explanation:Incorrect:Not A: there are both stateful and stateless alerts.Not B: Metrics have defaults.Not C: An SNMP alert can have multiple destinations.

Which two are the supported and appropriate migration methods to minimize downtime?

Posted by seenagape on September 23, 2013 5 comments

You plan to migrate your Oracle Version 11.1.0.2 database to your Exadata Database Machine.The database supports an online transaction processing (OLTP) workload and is currently hostedon a Little Endian platformWhich two are the supported and appropriate migration methods to minimize downtime?

A.Upgrade source database to 11.2.0 and migrate using a physical standby database.

B.Migrate using Data Pump.

C.Migrate using GoldenGate.

D.Migrate using cross platform Transportable Database.

E.Migrate using ASM online migration.

Explanation:B:Oracle Data Pump can be used to migrate an Oracle database to a new platform,and to movefrom an older release of the database to a newer release. Using Oracle Data Pump to move anE-Business Suite database is a well-documented and tested procedure, and can be used tomigrateyour database to the Oracle Exadata Database Machine and upgrade it to Oracle Database 11grelease 2 (11.2) in the same exerciseReference:Migrating the Oracle E-Business Suite Database to Oracle Exadata Database MachineUsingTransportable TablespacesReference:Migrating Oracle E-Business Suite to Oracle Exadata Database Machine Using OracleData Pump

Which statement is true about the I/O performance of the DATA01 ASM diskgroups?

Posted by seenagape on September 23, 2013 1 comment

Consider the following sequence of CELLCLI commands and SQL statements:

All CELLCLI commands and SQL statements are executed successfully without warnings.Which statement is true about the I/O performance of the DATA01 ASM diskgroups?

A.The DATA01 diskgroups has better performance because the DATA01 griddisks were created first.

B.The DATA02 ASM diskgroup has better performance because the DATA02 diskgroups was created first.

C.The DATA01 diskgroup has better performance because the DATA01 griddisks are created on interleaved cell disks.

D.The performance of both diskgroups is balanced because they are created on interleaved griddisks.

Explanation:Griddisks are the fourth layer of abstraction, and they will be the Candidate Disks tobuild your ASM diskgroups from. By default (interleaving=none on the Celldisk layer), the firstGriddisk that is created upon a Celldisk is placed on the outer sectors of the underlying Harddisk.It will have the best performance thereforeIncorrect:Not D: non-interleaved is the default.

Select two actions that describe the operating system (O/S) account on the cells to which you should log in, and the tool that may be used to drop the celldisks.

Posted by seenagape on September 23, 2013 4 comments

You must drop all celldisks on all the cells in a quarter rack as part of a reconfiguration project, tosupport normal redundancy interleaving.Select two actions that describe the operating system (O/S) account on the cells to which youshould log in, and the tool that may be used to drop the celldisks.

A.To the CELLMONITOR account using CELLCLI interactively on each cell.

B.To CELLADMIN account calling CELLCLI on all cells using DCLI

C.To either the CELIMONITOR or the CELLADMIN account calling CELLCLI on all cells using DCLI

D.To the CELLMONITOR account calling CELLCLI on all cells using DCLI

E.To the CELLADMIN account using CELLCLI interactively on each cell

F.To either the CELLMONITOR or CELLADMIN account calling interactively on each cell

Explanation:Note:*Each Exadata Storage cell can be monitored, configured, and maintained using the cellclicommand line interface. To invoke the CLI, simply login to the Exadata cell as cellmonitor,celladmin, or root, and type “cellcli”. Within cellcli, a wide range of commands can be invoked tomonitor the cell.*While connected to cellcli as the Linux account celladmin, you can perform all cellcli commandsexcept calibrate.While logged into the cell server as cellmonitor, you can do any “read-only” commands; youcannot change any configuration or attributes.

Which two statements are true about the IPTables firewall configuration on a Database Machine- Machine after the default Initial deployment?

Posted by seenagape on September 23, 2013 6 comments

Which two statements are true about the IPTables firewall configuration on a Database Machine- Machine after the default Initial deployment?

A.IPTables is configured with Oracle supplied rules on the cells.

B.IPTables is configured with Oracle supplied rules on the database servers.

C.IPTables is installed and available but not configured on any servers.

D.IPTables is installed and available but not configured on the database servers.

E.IPTables is installed and available but not configured on the cells.

Explanation:Note:*As for the iptables settings, I don’t believe Oracle supports makingmodifications to these rules. They’re configured out of the box based on theversion of the storage server software you’re running. As far as I know, theconfiguration cannot be easily modified.

Which three Database Machine components or features would you recommend to support these requirements?

Posted by seenagape on September 23, 2013 6 comments

You have two very large databases supporting OLTP workloads which run on multiple small-bladestyle servers in a cluster and which require optimal latency for I/O.You plan to migrate them to a Database Machine once a capacity planning exercise is finished.

The database backup strategy requires that backups are written directly to media.High availability requirements state that you must be able to survive node failures at any time.Which three Database Machine components or features would you recommend to support theserequirements?

A.Use of write back flash cache

B.Use of smart flash logs

C.High capacity disks in the Database Machine

D.High performance disks in the Database Machine

E.A high capacity expansion full rack

F.A high performance expansion full rack

Explanation:B:The Exadata Smart Flash Cache featureof the Exadata Storage Server Software intelligently caches database objects in flashmemory, replacing slow, mechanical I/O operations to disk with very rapid flash memoryoperations.

Identify the three components that serve a purpose only in the Database Machine.

Posted by seenagape on September 23, 2013 9 comments

Identify the three components that serve a purpose only in the Database Machine.

A.ASM intelligent Data Placement (IDP)

B.Intelligent Database Protocol (IDB)

C.Database Resource Manager (DBRM)

D.I/O Resource Manager (IORM)

E.Database Filesystem (DBFS)

F.The DISKMON process

Explanation:A:Intelligent Data Placement, a feature of ASM that allows placing data in such away that more frequently accessed data is located close to the periphery of the disk where theaccess is faster.B:The Exadata software is optimally divided between the database servers and Exadata

cells. The database servers and Exadata Storage Server Software communicate using the iDB –the Intelligent Database protocol. iDB is implemented in the database kernel and transparentlymaps database operations to Exadata-enhanced operations. iDB implements a function shippingarchitecture in addition to the traditional data block shipping provided by the database. iDB isused to ship SQL operations down to the Exadata cells for execution and to return query resultsets to the database kernel. Instead of returning database blocks, Exadata cells return only theD:The inter-database I/O allocations are defined within the software in the Exadata cell andmanaged by the I/O Resource Manager (IORM). The Exadata cell software ensures that interdatabase I/O resources are managed and properly allocated within, and between, databases.

Which three statements are true about this configuration?

Posted by seenagape on September 23, 2013 8 comments

You installed ASR Manager on a stand-alone server and configured Auto Service Request (ASR)for your Database machine and its assets.Which three statements are true about this configuration?

A.When a component fault occurs, fault telemetry is securely transmitted to Oracle via Simple Network Management Protocol (SNMP).

B.Simple Network Management Protocol (SNMP) traps are used to send notifications from storage servers to ASR Manager.

C.When a component fault occurs, fault telemetry is securely transmitted to Oracle via HTTPS.

D.Simple networkManagement Protocol(SNMP) traps are used to send notification from Enterprise manager to ASR Manager.

E.Simple Network Management Protocol (SNMP) traps are used to send notifications from database servers to ASR Manager.

F.Simple Network Management Protocol (SNMP) traps received by ASR Manager are forwarded to Enterprise Manager.

Explanation:A (not C).To configure fault telemetry, choose one of the following three options:Add SNMP Trap Destinations Using OneCommand (recommended for new installations)Add SNMP Trap Destinations for Multiple Servers Using the dcli UtilityAdd SNMP Trap Destinations for a Single ServerE (not B): As per question: “…configured Auto Service Request (ASR) for your Database machineand its assets.”F (not D).

Which two actions could you take to do this?

Posted by seenagape on September 23, 2013 8 comments

Your database Machine has the exachk utility pre-installed and you decide to use it periodically, tovalidate the installation against Oracle’s recommended best practices.Which two actions could you take to do this?

A.Use a cron job on a database node to run it at regular intervals.

B.Rut it once from a database node and it will then perform periodic monitoring automatically.

C.Use a cron job on each cell to run it at regular intervals.

D.Run it once on each cell and it will then perform periodic monitoring automatically.

E.Create a Job in Enterprise Manager to run the exachk utility at regular intervals.

Explanation:Note:*Oracle Exadata Database Machine Cells are added as targets during the database machinediscovery workflow and are grouped automatically under the group Exadata Grid.Based on the Exadata Grid group, a group of Exadata cells can be managed together throughEnterprise Manager Cloud Control 12c.

Which two are true about I/O to the cells using this plan?

Posted by seenagape on September 23, 2013 10 comments

You are examining the existing IORM configuration on the cells of Database Machine, to see ifthey require my modifications based on recent changes to various workloads.All seven cells in your X3-2 half-rack shown the following:

Which two are true about I/O to the cells using this plan?

A.I/O requests in the batch category may use flashcache if the I/O is from the sales finance database, and these I/O requests are guaranteed to get 80% of the I/O if the interactive category I/Os use no more than 20%.

B.I/O requests made by sessions in the marketing database may use flashing and flashcache if no other categories or database or database are using flashing and flashcache at the same time.

C.I/O requested in the interactive category may use flashdns if the I/O is from the sales or finance databases, and these I/O requests are guaranteed to get 90% of the I/O if the enough I/Os are issued in this category.

D.I/O requests from the sales database may use flashing regardless of the I/O category.

E.No I/Os in any category or from any database may use flashing or flashcache because the objective is off.

Explanation:list iormplan detailNote:*The I/O Resource Manager (IORM) extends the concept of resource groups with a new attributeknown as a category. While resource groups allow DBRM to manage resources within a adatabase, categories provide I/O resource management among multiple databases.*cellcli> alter iormplan objective=’balanced’— {balanced | off | low_latency | high_throughput | auto“off” simply turns off the IORM plan’s IO metering.

Identify three statements that correctly explain where the compression and decompression can be done.

Posted by seenagape on September 23, 2013 7 comments

You are using Hybrid Columnar Compression for a table stored in a tablespace that is contained inan Exadata-based ASM diskgroup. Identify three statements that correctly explain where thecompression and decompression can be done.

A.Decompression can be done on the database servers.

B.Compression can be done on the Exadata storage servers.

C.Compression can be done on the database servers.

D.Decompression can be done on the Exadata storage servers.

Explanation:B:*Exadata storage provides an advanced compression technology, Hybrid Columnar Compression,that typically provides 10x, and higher, levels of data compression.*The Exadata Storage Server (Exadata storage or Exadata cells) is used asthe storage for the Oracle Database in the Database Machine. It runs the Exadata Storage ServerSoftware that provides the unique and powerful Exadata technology including Smart Scan, SmartFlash Cache, Smart Flash Logging, IO Resource Manager, Storage Indexes and Hybrid ColumnarCompression.

A, D:*decompression

/Queries run directly on Hybrid Columnar Compressed data doesnot require the data to be decompressed/Data that is required to satisfy a query predicate does not needto be decompressed; only the columns and rows being returnedto the client are decompressed in memory/The decompression process typically takes place on the OracleExadata Storage Server in order to maximize performance andoffload processing from the database server.

Shown: Select two reasons why the statement would have produced so many “cell single block physical read” waits compared to “cell smart table scan” waits.

Posted by seenagape on September 23, 2013 2 comments

You are monitoring and evaluating a create index statement on your Database Machine and haverun the following query after executing statement, providing the output. Shown:

Select two reasons why the statement would have produced so many “cell single block physicalread” waits compared to “cell smart table scan” waits.

A.There are huge numbers of migrated rows in the table on which the index is being built.

B.There is an uncommitted transaction that has modified one block of the table on which the index is being built, in each cell.

C.Thereis a transaction that has modified one block of the table on which the index is being built in each cell, which committed after the create index began.

D.There are huge numbers of chained rows in the table on which the index is being built.

E.There is a ROWID column in the table on which the index is being built.

Explanation:A:It could be that row migration.D:It could be that row migration or chained rows could cause it.Note:*Some facts about scans:

Scans exists in “OLTP” systemsExadata smart scan requires a direct path read.

A direct path read is chosen at runtime based on internal heuristicsThe STORAGE clause in an explain plan doesnt necessarily mean youwill perform a smart scan.*The buffer caching in certain “OLTP” environments canoccasionally induce conventional reads when smartscan is faster.*Typically see cell multiblock physical read instead of cellsmart table scan waits*No one-size-fits-all solution can be given here but it isvery fixable.

Which three factors should you consider when choosing a method for migrating a database to the Database Machine?

Posted by seenagape on September 23, 2013 9 comments

Which three factors should you consider when choosing a method for migrating a database to theDatabase Machine?

A.Typeof database workload

B.Number of tablespaces in the source database

C.Size of the source database

D.Endian format of the source database

E.ASM attributes and allocation unit (AU) size of the diskgroups used by the source database

Explanation:A:Use Real Production Workload– Real Application Testing (RAT)• Database Workload Replay• SQL Performance Analyzer (SPA)D:*Endianformat: Non-Exadata formatReference:Exadata MAA Best Practices,Migrating Oracle Databases

Which three are among the software components that constitute the QoS Management framework?

Posted by seenagape on September 23, 2013 2 comments

Which three are among the software components that constitute the QoS Managementframework?

A.Cluster Health Monitor (CHM)

B.Cluster Verification Utility (CLUVFY)

C.O/S Resource Manager

D.Grid Infrastructure for a standalone server

E.Grid Infrastructure for a cluster

F.OC4J cluster resource

Explanation:A:In conjunction with Cluster Health Monitor, QoS Management’sMemory Guard detects nodes that are at risk of failure due tomemory over-commitment. It responds by automatically preventingnew connections thus preserving existing workloads and restoresconnectivity once the sufficient memory is again available.F:The ora.oc4j is for the QoS (Quality of Service Management), which is only available onExadata.Incorrect:Not B: The Cluster Verification Utility (CVU) performs system checks in preparation for installation,patch updates, or other system changes. Using CVU ensures that you have completed therequired system configuration and preinstallation steps so that your Oracle grid infrastructure orOracle Real Application Clusters (Oracle RAC) installation, update, or patch operation completessuccessfully.

which components in the Enterprise manager Architecture for the Database Machine?

Posted by seenagape on September 23, 2013 3 comments

Which two communication methods are used by which components in the Enterprise managerArchitecture for the Database Machine?

A.SNMP traps for alerts are sent by the storage server ILOM to the storage serverMSprocess

B.SNMP traps for alerts are sent by the storage serverMSprocess to the storage server ILOM

C.SNMP traps for alerts are sent by the storage serverILOMto the Enterprise Manageragent.

D.SNMP traps for alerts are sent by the storage serverMSprocess to the enterprise Manageragent

E.SNMP traps for alerts are sent by the storage server ILOM to the storage server RS process.

Explanation:There are two types of server alerts that come from Oracle Exadata Storage Server:* (A)For Integrated Lights Out Manager (ILOM)-monitored hardware components, ILOMreports a failure or threshold exceeded condition as an SNMP trap, which is received by MS.MS processes the trap, creates an alert for the storage server, and delivers the alert via SNMP

to Oracle Enterprise Manager 12c.* (D)For MS-monitored hardware and software components, MS processes a failure or thresholdexceeded condition for these components, creates an alert, and delivers the alert via SNMP toOracle Enterprise Manager Cloud Control 12c.Reference:Managing Oracle Exadata with Oracle Enterprise Manager 12c, Oracle White Paper

Which three statements are true regarding the configuration of Auto Service Request (ASR) on your Database Machine?

Posted by seenagape on September 23, 2013 1 comment

Which three statements are true regarding the configuration of Auto Service Request (ASR) onyour Database Machine?

A.HTTPS connectivity must be enabled from the ASK Manager host to the internet.

B.ASR Manager must be installed on one of the database servers.

C.Oracle Solaris must be used on the server where ASK Manager is installed.

D.SMTP must be enabled on at least one database server.

E.Oracle Linux must be used on the server where ASR Manager is installed

F.ASRManager may be installed on any type of server running Oracle Linux.

G.ASRManager may be installed on any type of server running Oracle Solaris.

Explanation:A:Before installing ASR, please ensure the following conditions are met:/ (A)Ensure connectivity to the Internet using HTTPS./Make sure you have access to My Oracle Support and that your contact information is correct andcurrent./Make sure all of your assets have a Contact assigned and that the contact is correct and current./Identify and designate a system to serve as ASR Manager./Identify and verify ASR assets.F, G (not C, not E, not B):The recommended configuration is to install the ASR Manager, whichreceives fault telemetry information from the servers in Oracle Exadata Database Machine, on anexternal standalone server. This server must run Solaris or Linux as the operating system.Reference: OracleAuto Service Request Exadata Database Machine Quick Installation Guide

Which two are true about Smart Scan?

Posted by seenagape on September 23, 2013 1 comment

Which two are true about Smart Scan?

A.a query rewrite may occur to a container table stored in Exadata but will never benefit From Smart scan.

B.Column projection does not contribute to the performance benefit of Smart Scan

C.It is possible to offload single row functions to the storage servers.

D.Some joins can be offloaded to the storage servers.

E.A query rewrite may occur to a container table stored Exadata, and it will always benefit from Smart Scan.

F.All joins can be offloaded to the storage servers.

Explanation:C:With Exadata storage, database operations are handled much more efficiently.Queries that perform table scans can be processed within Exadata storage with only the requiredsubset of data returned to the database server. Row filtering, column filtering and some joinprocessing (among other functions) are performed within the Exadata storage cells. When thistakes place only the relevant and required data is returned to the database server.D (not F):*Exadata performs joins between large tables and small lookup tables, a very common scenariofor data warehouses with star schemas. Joining large tables and small lookup tables isimplemented using Bloom Filters, which are a very efficient probabilistic method to determinewhether a row is a member of the desired result set.*If storage indexes are so great, why doesn’t Oracle Exadata use them all the time? The shortanswer is that they are created and used only when they will be beneficial.*To use storage indexes, Oracle Exadata queries must use smart scans, so not all types ofapplications can benefit from storage indexes. Applications with queries that include predicatesand perform a lot of full table scans or fast full scans of indexes—typically those used in datawarehousing environments—will benefit greatly from storage indexes. Onlinetransactionprocessing (OLTP) applications, on the other hand, typically access a small number ofrows through standard indexes and do not perform full table scans, so they may not benefit fromstorage indexes.Note:*Storage indexes reside in the memory of the storage servers—also called storage cells—andsignificantly reduce unnecessary I/O by excluding irrelevant database blocks in the storage cells.*To use storage indexes, Oracle Exadata queries must use smart scans, so not all types ofapplications can benefit from storage indexes.Incorrect:Not B:Exadata provides column filtering, also called column projection, for table scans. Only the

columns requested are returned to the database server rather than all columns in a table. Forexample, when the following SQL is issued, only the employee_name and employee_numbercolumns are returned from Exadata to the database kernel.SELECT employee_name, employee_number FROM employee_table.For tables with many columns, or columns containing LOBs (Large Objects), the I/O bandwidthsaved can be very large. Using both predicate and column filtering dramatically improvesperformance and reduces I/O bandwidth consumption. In addition, column filtering also applies toindexes, allowing for even faster query performance.

Reference: OracleCommunications Data Model Implementation and Operations Guide,ExadataSmart Scan Processing and Storage Index

Which two access paths will always generate either a set of “cell smart table scan” or a set of “cell smart index scan” requested?

Posted by seenagape on September 23, 2013 10 comments

A read-only application is in development and is using a test database on a Database Machine.You are examining SQL statements from this application in an attempt to determine which oneswill benefit from the Exadata Smart scan capability.The following is true about the tables used by the application:1. The data for the tables has just been loaded.2. There are no applications accessing the tables currently.3. None of the indexes are compressed or reverse key indexes.4. The tables use the default organization type data.5. The only data types for the table are varchar (2), number, or date.6. The largest number of columns for any table is 29.7. No access is based on ROWID, or virtual columns.Which two access paths will always generate either a set of “cell smart table scan” or a set of “cellsmart index scan” requested?

A.Full scans on sorted hash clustered tables executed in parallel

B.Full table scans on index organized tables executed in parallel.

C.Full table scans on heap tables executed in parallel

D.Full scans on index clustered tables executed in parallel

E.full scans on hash clustered tables executed in serially

F.fast full scans on B*Tree indexes executed in parallel

G.full index scans on B*Tree indexes executed in parallel

Explanation:Note:*Exadata is built to efficiently use the resources to return results to the end user. Toward that endit has been designed to offload query tasks to the storage server, when possible, to reduce theamount of data passed to the calling session. Certain criteria must be met to offload to the storageserver:/Full table or index scans must be used/Direct path reads must be used to access the dataIf the first requirement is not met another option can trigger the offloading mechanism:/Parallel query is in use*How do you know you’ve used a Smart Scan? The ‘cell smart table scan’ wait event or the ‘cellsmart index scan’ wait event will show activity indicating a Smart Scan occurred. Nothing in the

execution plan would be displayed to prove a Smart Scan was used; querying v$waitstat would bethe only way to confirm that a Smart Scan was implemented.

which two ways do all the targets supported by the plug-in get configured?

Posted by seenagape on September 23, 2013 1 comment

You have used setupem.sh to deploy a plug in for Grid Control.In which two ways do all the targets supported by the plug-in get configured?

A.The targets must be configured by an Enterprise Manager administrator manually using Grid Control.

B.Setupem.sh is used again to configure the targets.

C.The targets must be configured by an O/S administrator manually.

D.The targets must be configured by a database administrator manually.

E.There may be more than one target for each plug-in.

Explanation:

Identify three valid configuration options that can be implemented during the initial configuration process of a new Database Machine by using the Exadata Deployment Assistant

Posted by seenagape on September 23, 2013 2 comments

Identify three valid configuration options that can be implemented during the initial configurationprocess of a new Database Machine by using the Exadata Deployment Assistant

A.database character set

B.size of the RECO ASM diskgroup

C.size of the DBFS diskgroup

D.O/S owner mode (standard O/S authentication or role-separated O/S authentication)

E.RDBMS DBA group name

Explanation:D: Determine which OS owner mode to use

Which two are true about the use of the Integrated Lights Out Manager (ILOM) on the Database Machine?

Posted by seenagape on September 23, 2013 12 comments

Which two are true about the use of the Integrated Lights Out Manager (ILOM) on the DatabaseMachine?

A.ILOM can be used to power-on the Cisco switch.

B.ILOM can be used to power on the InfiniBand switches.

C.ILOM can be used to power-on the database servers.

D.ILOM generates hardware alerts for the power distribution units.

E.ILOM provides a remote console for the storage servers.

Explanation:B:How to monitor the bandwidth of Exadata Infiniband Switch?There are two ways, the simplest method is to use the Fabric Monitor (ILOM Web Interface), andthe other way is just to use SNMP request.E:*The Oracle ILOM Remote Console is supported on all Oracle Sun x86 processor-based servers.It is also supported on some SPARC processor-based servers. The Oracle ILOM Remote Console

is a Java application that you can launch from the Oracle ILOM web interface*Remote Management: Integrated Lights Out Manager (ILOM) Ethernet port

Which two methods would you use to check the status of all 36 ports?You are checking the status of the ports on the one of the InfiniBand switches in your DatabaseMachine.You have run the getportstatus as shown:

You have 36 ports to check.Which two methods would you use to check the status of all 36 ports?

A.Use Enterprise Manager.

B.Use the ibqueryerros.pl script logged into the InfiniBand switch as root.

C.Use Database Control.

D.Create user-defined metrics for the InfiniBand switch.

Explanation:B:ibqueryerrors.pl -rR -s LinkDowned,RcvSwRelayErrors,XmtDiscards,XmtWaitibqueryerrors.pl -sRcvSwRelayErrors,RcvRemotePhysErrors,XmtDiscards,XmtConstraintErrors,RcvConstraintErrors, ExcBufOverrunErrors,VL15Dropped— A single invocation of this command will report on all switch ports on all switches. Run thischeck from a database server or a switch.*Switch Port Configuration MonitorThis metric is mainly used for monitoring the connectivity of ports and raising alerts when there isa disconnection.

Which three operations can be offloaded to the Exadata storage servers when doing a smart scan against this table…?

Posted by seenagape on September 23, 2013 7 comments

A table in one of your database schemas contains only varchar, number, and date data types forthe columns.Which three operations can be offloaded to the Exadata storage servers when doing a smart scanagainst this table, if no other situations arise that prevent Smart Scan from occurring?

A.Column filtering

B.Sort merge join filtering

C.Predicate filtering

D.Nested loop Join filtering

E.Hash join filtering

F.Virtual column filtering

Explanation:Exadata 11.1 Smart Scan operations include:– Restriction (filtering of rows)– Projection (filtering of columns)– Join Filters (Bloom Filters) commonly used in Fact/Dimension joins found in Star Schemas. Thisis different than Star Transformation.Other join operations such as HASH(not E), SORT, SORT-MERGE(not B), NESTED LOOP(notD), etc. are done by the Oracle Database Grid.A:Smart Scan Column Filtering

Exadata provides column filtering, also called column projection, for table scans. Only the columnsrequested are returned to the database server rather than all columns in a table. For example,when the following SQL is issued, only the employee_name and employee_number columns arereturned from Exadata to the database kernel.SELECT employee_name, employee_number FROM employee_table.For tables with many columns, or columns containing LOBs (Large Objects), the I/O bandwidthsaved can be very large. Using both predicate and column filtering dramatically improvesperformance and reduces I/O bandwidth consumption. In addition, column filtering also applies toindexes, allowing for even faster query performance.C:Smart Scan Predicate Filtering

Exadata enables predicate filtering for table scans. Only the rows requested are returned to thedatabase server rather than all rows in a table. For example, when the following SQL is issuedonly rows where the employees’ hire date is after the specified date are sent from Exadata to thedatabase instance.SELECT * FROM employee_table WHERE hire_date > ‘1-Jan-2003’.This ability to return only relevant rows to the server greatly improves database performance. Thisperformance enhancement also applies as queries become more complicated, so the samebenefits also apply to complex queries, including those with subqueries.

Which three must he true for Smart Scans to be done?

Posted by seenagape on September 23, 2013 8 comments

Which three must he true for Smart Scans to be done?

A.Executing a query in parallel

B.Setting _serial_direct_read=true in the session issuing the SQL statements

C.Having direct path reads used at run time

D.Having a 4 megAUsize for the ASM diskgroup containing the tablespace in which tables accessed by a query are stored

E.Cell_offload_process = true for the ASM diskgroup containing the tablespace in which tables accessed by a query are stored.

F.cell.smart_scan_capable=true for the ASM diskgroup containing the tablespace in which tables accessed by a query are stored.

Explanation:F:ASM Diskgroup has an attribute: cell.smart_scan_capable• Must be set to TRUE for Smart Scans to work

Execute “shutdown –h now” on all servers.

Posted by seenagape on September 23, 2013 9 comments

Identify the correct sequence of commands to completely power off a Database Machine in anOrderly fashion:1. Execute “crsctl stop cluster –all” as the grid user from one database server.2. Execute “crsctl stop cluster –all” as the root user from one database server.

3. Power off all network switches using their power switch.4. Execute “crsctl stop cluster –all” as the root user from one database server.5. Execute “crsctl stop cluster –all” as the grid user from one database server.6. Power off the rack using the power switches on the PDUs.7. Execute “shutdown –h now” on all database servers.8. Execute “shutdown –h now” on all Exadata storage servers.9. Execute “shutdown –h now” on all servers.

A.1, 9, 3 and 6

B.2, 9 and 6

C.4, 7, 8, 3 and 6

D.5, 8, 7, 3 and 6

E.2, 8, 7, 3 and 6

F.1, 8, 7, 3 and 6

G.2, 7, 8 and 6

H.2, 8, 7 and 6

Explanation:2,8, 7,3, 6Note:*(step 1)With root user, from $ORA_CRS_HOME, shutdown the CRS:/crsctl stop cluster*Here is the command to stop the cluster on all nodes:# <OracleGridInfrastructureHome>/bin/crsctl stop cluster –all*To stop a server, use the shutdown command. To stop immediately and keep it down, i.e. notreboot, execute:# shutdown -h -y now

which case would you consider dropping indexes to allow Smart Scans to occur?

Posted by seenagape on September 23, 2013 1 comment

You plan to migrate an existing production database supporting online transaction processing(OLTP) workloads to the Exadata Database Machine. The database currently supports anapplication requiring fast response times, which satisfies stringent requirements, and most of the

application queries use index access to the tables in the application schema.For which case would you consider dropping indexes to allow Smart Scans to occur?

A.Drop non-constraint indexes if Smart Scan occurs instead of an index access path on the corresponding table.

B.Drop non-constraint indexesif Smart Scan performs better than index unique scans on the corresponding table.

C.Drop non-constraint indexes if Smart Scan performs better than index range scans on the corresponding table.

D.Drop non-constraint Indexes if Smart Scan performs better than any index scans on the corresponding table.

Which three are true regarding this requirement?

Posted by seenagape on September 23, 2013 1 comment

Your Database Machine has a large database with some very large tables supporting OLTPworkloads.High volume Insert applications and high volume update workloads access the same tables.You decide to compress these tables without causing unacceptable performance overheads to theOLTP application.Which three are true regarding this requirement?

A.Using’compress for oltp’will compress the data less than if using Hybrid Columnar Compression when specified with compress for query low.

B.The compression is performed on the storage servers when using compress for oltp in an Exadata environment.

C.The compression method compress for archive high is the worst fit for this requirement.

D.Using’compress for oltp’will compress the data more than if using Hybrid Columnar Compression when specified with compress for archive low.

E.The compression is performed on the database servers when using’compress for oltp’in an Exadata environment.

Explanation:Note:(E not B):*Types of compressionBasic compressionOLTP compressionWarehouse compression

Online archival compressio*/OLTP compression allows compression during DML operations./Basic compression works at the data block level.*When you enable table compression by specifying COMPRESS FOR OLTP, you enable OLTPtable compression. Oracle Database compresses data during all DML operations on the table.This form of compression is recommended for OLTP environments.* When you specify COMPRESS FOR QUERY or COMPRESS FOR ARCHIVE, you enable hybridcolumnar compression. With hybrid columnar compression, data can be compressed during bulkload operations. During the load process, data is transformed into a column-oriented format andthen compressed. Oracle Database uses a compression algorithm appropriate for the level youspecify. In general, the higher the level, the greater the compression ratio.Hybrid columnar compression can result in higher compression ratios, at a greater CPU cost.Therefore, this form of compression is recommended for data that is not frequently updated.

Which statement is true about operating systems on database Machine multi-rack configuration consisting of two full racks and one Exadata storage rack?

Posted by seenagape on September 23, 2013 7 comments

Which statement is true about operating systems on database Machine multi-rack configurationconsisting of two full racks and one Exadata storage rack?

A.All Exadata storage servers and all database servers must run the Oracle Linux O/S and X3-8 database server may run the Oracle Solaris O/S.

B.All Exadata storage servers must run the Oracle Linux O/S and all database servers within the same cluster must run the Oracle Linux O/s.

C.All Exadata storage servers must run the OracleLinuxO/S and all database servers within the same cluster must run the same O/s.

D.All Exadata Storage Servers must run the Oracle Solaris O/S and all database servers within the same cluster must run the same O/S.

E.All Exadata storage servers in the same cluster must run the same O/S but Exadata Storage Servers in different clusters may run a different O/S.

Explanation:Note:*Oracle Linux or Solaris based database server

Which three are true regarding the use of Storage Indexes?

Posted by seenagape on September 23, 2013 7 comments

Which three are true regarding the use of Storage Indexes?

A.Different storage regions may have different columns indexed for the same table.

B.A Storage index is automatically maintained by CELLSRV based on the filter columns of the offload SQL.

C.The use of Storage indexes for a particular database can be disabled by using an I/O Resource Manager Database Plan.

D.Storage Indexes occupy space in the Smart Flash Cache.

E.The use of Storage Indexes for particular categories of I/O can be disabled by using an I/O Resource Manager Category Plan.

F.A maximum of eight table columns for any table are Indexed per storage region.

Explanation:F, not D: Each disk in the Exadata storage cell is divided into equal sized pieces called storageregions (default 1MB). There is an index entry for every storage regions (1MB of data stored ondisk). Each entry contains the minimum and maximum value for columns seen in ‘where’ clausepredicates. Information for up to 8 columns can be stored. The index is then used to eliminate diskIO by identifying which storage regions don’t match the ‘where’ clause of a query.Note:*Storage indexes are used during smart scans. All the limitations to smart scans apply to storageindexes. They do not work with joins. Bind variables are supported, however it’s slightly morerestrictive than regular indexes/queries.*The storage index is stored in the memory on each of the Exadata storage cells and is createdand maintained transparently. However, if a storage cell is shutdown or rebooted the storage indexwill be lost from memory and will be recreated on subsequent accesses to the data after the cellhas been brought back online.*Storage Indexes are a very powerful capability provided in Exadata storage that helps avoid I/Ooperations. The Exadata Storage Server Software creates and maintains a Storage Index (that is,metadata about the database objects) in the Exadata cell. The Storage Index keeps track of

minimum and maximum values of columns for tables stored on that cell. When a query specifies aWHERE clause, but before any I/O is done, the Exadata software examines the Storage Index todetermine if rows with the specified column value exist in the cell by comparing the column valueto the minimum and maximum values maintained in the Storage Index. If the column valueisoutside the minimum and maximum range, scan I/O for that query is avoided. Many SQLOperations run dramatically faster because large numbers of I/O operations are automaticallyreplaced by a few lookups. To minimize operational overhead, Storage Indexes are created andmaintained transparently and automatically by the Exadata Storage Server Software.

Which four statements are true about Exadata Smart Flash Cache?

Posted by seenagape on September 23, 2013 1 comment

Which four statements are true about Exadata Smart Flash Cache?

A.Smart Scan will always be done for I/Os to flash based griddisks.

B.Flash based ASM diskgroups may share space with the Flash Cache on the flashdisks.

C.Single block reads can benefit from Smart Flash Cache.

D.Smart Scan will never be done for I/Os to flash based griddisks.

E.Multiblock reads can benefit from Smart Flash Cache.

F.Smart Flash Logs reduce the size of Smart Flash Cache.

Explanation:B: *Grid disks (the logical disksthat reside on physical cell disks) are created on these flash-based cell disks and the grid disksareassigned to an Automatic Storage Management (ASM) diskgroup. The best practice would beto reserve the same amount of flash on each Exadata cell for flash disks and have the ASMdiskgroup spread evenly across the Exadata cells in the configuration just as you would do forregular Exadata grid disks. This will evenly distribute the flash I/O load across the Exadata cellsand flash.Note:*The ExadataStorage Server comes with a substantial amount of flash storage. A small amount is allocated fordatabase logging and the remainder will be used for caching user data

Which two statements are true?

Posted by seenagape on September 23, 2013 3 comments

You have altered an index supporting a constraint to be invisible on a large read only datawarehouse table, to determine it Smart Scan operations will be fast enough to satisfy yourperformance requirements.

Given the results of your testing, you consider dropping the index.Which two statements are true?

A.You must retain the index and set the constraint to DISABLE NOVALIDATE RELY to enforce the constraint

B.You may drop the index and use a constraint with the DISABLE NOVALIDATE RELYflags

C.You must retain the index and make it visible again for the constraint to be enforced.

D.You may drop the index and make the constraint invisible, because this is enough for the constraint to be enforced.

E.You may retain the index, and leave it as invisible, because this is enough for the constraint to be recognized.

Explanation:Note:*You may have noticed that we introduced Invisible Indexes as an 11g New Feature. Their mainbenefit is that we can test whether performance differs if we would drop an index without actuallydropping it. This is particular useful after an Exadata Migration because we expect that someconventional indexes migrated are now obsolete and may be substituted by Storage Indexes.*With making indexes invisible, we can easily check whether indexes are useful without having todrop (and in case recreate) them actually. While this may be of interest for “ordinary” OracleDatabases already, it is particular a useful feature for Exadata where we expect someconventional indexes to become obsolete after a migration.*DISABLE NOVALIDATE RELY means: “I don’t want an index and constaraint checking to slowdown my batch data loading into datawarehouse, but the optimizer can RELY on my data loadingroutine and assume this constraint is enforced by other mechanism”. This information can greatlyhelp optimizer to use correct materialized view when rewriting queries. So if you don’t usematerialized views for query rewrite then you can put RELY for all your constraints (or NORELYfor all your constraits) and forget about it.

Which two activities are supported on the storage servers in the Database Machine?

Posted by seenagape on September 23, 2013 9 comments

Which two activities are supported on the storage servers in the Database Machine?

A.Installing an alternative package manager

B.configuring secure shell user equivalency for the callmonitor user

C.changing root password

D.upgrading the Storage Server software package using RPN

E.upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure

Explanation:D:What Oracle Solaris Brings to Oracle Exadata Database MachineSimplified, improved updates—Oracle Solaris 11 uses the new Image Package System (IPS),which is a network-based package management that provides a framework for complete softwarelifecycle management such as installation, upgrade and removal of software packages

why to assure that sensor readings, faults any related alerts, are visible in Enterprise Manager?

Posted by seenagape on September 23, 2013 79 comments

You plan to monitor the status of the motherboard, memory, power, fans, and network cards onthe database nodes in your Database machine using Enterprise Manager.Where must you set the thresholds for these hardware components and why to assure that sensorreadings, faults any related alerts, are visible in Enterprise Manager?

A.Set thresholds in ILOM and in Enterprise Manager because they are not preset anywhere and must be set in both places

B.Set thresholds only in ILOM because they are not preset anywhere but need only be set in ILOM.

C.No thresholds need be set because they are preset in the ILOM and in Enterprise Manager.

D.No thresholds needho set because they are preset in the ILOM and these are sufficient for monitoring.

Explanation:Note:* The ILOM management interface is also integrated with Oracle Enterprise Manager Ops Center. *ILOM Features and Functionalityinclude:Remote hardware monitoringwhich include:Monitor customer-replaceable units (CRUs) and fieldreplaceable units (FRUs), including powersupplies, fans, hostbus adapters (HBAs), disks, CPUs, memory, and motherboard*The ILOM-based service processor (SP) receives error telemetry about error events

that occur within the major system components on the host (CPU, memory, and I/Ohub) and the environmental subsystem within the chassis (such as fans, powersupplies, and temperature). The components and conditions are then diagnosed asfault events and captured in the ILOM event log.

Which three are true abort Enterprise Manager plug- in configuration for the Database Machine?

Posted by seenagape on September 23, 2013 3 comments

Which three are true abort Enterprise Manager plug- in configuration for the Database Machine?

A.There are several separate plug-ins for Grid Control.

B.There is one plug-in for Cloud Control.

C.There are several separate plug-ins for Cloud Control.

D.Some plug-ins require SNMP trap forwarders.

E.All plug-ins require SNMP trap forwarders.

F.There is one plug-in for Grid Control.

Explanation:A:Oracle Enterprise manager Grid control, is hands down the best monitoring andmanagement tool, for the oracle exadata database machine. It comes with plugins to monitor all

the hardware components of the database machine, and sensible, preset thresholds for proactivemonitoring.

Which is true regarding Enterprise Manager monitoring and configuration?

Posted by seenagape on September 23, 2013 3 comments

Which is true regarding Enterprise Manager monitoring and configuration?

A.Agents must be deployed on the- storage servers, in case all the database servers are down.

B.Monitoring the power distribution units (PDUs) is done by Enterprise Manager agents, but additional ethernet cables are required to connect the PDUs to the internal network switch in the Database Machine

C.Monitoring the power distribution units (PDUs) is done by Enterprise Manager agents without, any additional network configuration.

D.Agents may be deployed on the storage servers, in case all the database servers are down.

E.Monitoring the power distribution units (PDUS) is done by Enterprise Manager agents but additional ethernet cables are required to connect the PDUs to the corporate network switch.

Explanation:Note:*The following prerequisites must be met before you can deploy the plug-in:Set and validate the preferred credentials on all Agents where you want to deploy the plug-in. Thisis essential in order to deploy the plug-in.The PDU firmware version must be 1.02 or later.*This plug-in will be used to monitor PDU’s actual current value of Phase1, Phase2, and Phase3and raises appropriate events if they have crossed the different threshold values. Each PDU willhave a plug-in instance added to its own OEM Grid Control agent.By deploying the plug-in to your Grid Control environment, you gain the following managementfeatures:Monitor PDU targets.Raise alerts and violations based on thresholds set on monitoring and configuration data.Provide rich out-of-box metrics and reports based on the gatherReference:Oracle Enterprise Manager System Monitoring Plug-In Installation Guide for ExadataPower Distribution Unit

Which two are true about the use of DBFS in a Database Machine environment?

Posted by seenagape on September 23, 2013 4 comments

Which two are true about the use of DBFS in a Database Machine environment?

A.DBFS must be used to bulk load data into a database on the Database Machine if the staging area requires Exadata based shared storage.

B.DBFS must be used to have a POSIX compliant shared storage solution that is accessible from the database servers on a Database Machine.

C.DBFS must be used to bulk load data into a production database on the Database Machine.

D.DBFSmust use the DBFS_DG diskgroup for any DBFS store.

E.DBFS must be used to have a POSIX-compliant Exadata-based shared storage solution.

Explanation:Note:

*external tables on DBFS file-systems provide the probably the most high-performance way tobulk load data into your database.

Which three are true about Exadata storage server alerts?

Posted by seenagape on September 23, 2013 3 comments

Which three are true about Exadata storage server alerts?

A.A threshold based alert gets cleared automatically when the measured value no longer violates the threshold.

B.A storage server alert is only ever issued as a warning or at a critical situation.

C.Storage server alerts are all stateless alerts.

D.Storage server alerts notifications may be sent using SNMP.

E.Storage server alerts are all stateful alerts.

F.Storage server alerts notifications may be sent using SMTP.

Explanation:Incorrect:Not C, Not E: there are both stateful and stateless alerts

Which four commands must you execute to safely power off the storage server in your standard deployed quarter rack Database Machine assuming that redundancy is not compromised?

Posted by seenagape on September 23, 2013 1 comment

You are about to replace one memory DIMM in an Exadata storage server and need to power offthe affected cell.Which four commands must you execute to safely power off the storage server in your standarddeployed quarter rack Database Machine assuming that redundancy is not compromised?

A.‘crsctl stop cluster -all’ on one of the database servers

B.CellCLI> LIST GRIDDISK ATTRIBUTE name WHERE asmdeactivationoutcome != ‘Yes’

C.CellCLI> ALTER GRIDDISK ALL INACTIVE

D.CellCLI> LIST GRIDDISK WHERE STATUS != ‘inactive’

E.‘shutdown –h now’ on the affected cell

Explanation:B: Step 1:Run the following command to check if there are other offline disksCellCLI> LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != ‘Yes’

If any grid disks are returned, then it is not safe to take the storage server offline because properOracle ASM disk group redundancy will not be intact.C: Step 2:Inactivate all the grid disks when Oracle Exadata Storage Server is safe to take offline using thefollowing command:CellCLI> ALTER GRIDDISK ALL INACTIVETaking the storage server offline when one or more grid disks are in this state will cause OracleASM to dismount the affected disk group, causing the databases to shut down abruptly.D: Step 3:— Verify all grid disks are INACTIVE to allow safe storage server shut down by running thefollowing command:CellCLI> LIST GRIDDISK ATTRIBUTES name, asmmodestatusCellCLI> LISTGRIDDISKIf all grid disks are INACTIVE, then the storage server can be shutdown withoutaffecting database availabilityE:Step 4:To stop a server, use the shutdown command. To stop immediately and keep it down, i.e. notreboot, execute:#shutdown -h -y now

Which two are true concerning the allocation of I/O resources by the IORM within the CELLSRV process?

Posted by seenagape on September 23, 2013 4 comments

Which two are true concerning the allocation of I/O resources by the IORM within the CELLSRVprocess?

A.Control File I/O is managed automatically at high priority by IORM.

B.Control File I/O is considered part of the SYSTEM resource Consume group by IORM.

C.Log Writer I/O to the Smart Flash Log is considered part of the SYSTEM resource consumer group by IORM.

D.Log Writer I/O to the Smart Flash Log is managed automatically at high priority by IORM.

E.Database Writer I/O is managed automatically at normal priority by IORM.

F.Database Writer I/O is considered part of the SYSTEM resource consumer group by IORM.

Explanation:Note:

*IORM RulesIORM is only “engaged” when needed./ (A)Redo and control file writes always take precedence./ (E)DBWR(database writer)writes are scheduled at the same priority as user IO./IORM does not intervene if there is only one active consumer group on one database./Any disk allocation that is not fully utilized is made available to other workloads in relation to theconfigured resource plans./Background IO is scheduled based on their priority relative to user IO./For each cell disk, each database accessing the cell has one IO queue per consumer group andthree background queues./Background IO queues are mapped to “high”, “medium”, and “low” priority requests with differentIO types mapped to each queue./If no intradatabase plan is set, all non-background IO requests are grouped into a singleconsumer group called OTHER_GROUPS.Reference:Using IORM with Exadata

Identify the four steps you must perform to replace this flashdisk.

Posted by seenagape on September 23, 2013 7 comments

Last weekend, an Exadata storage server flashdisk entered the predictive failure state.The flashdisk is used by the flashcache and has a griddisk which is a member of a normalredundancy diskgroup.Identify the four steps you must perform to replace this flashdisk.

A.Identify the griddisk on the predictive failure flashdisk and drop it from the associated ASM diskgroup

B.Verify that the griddisk located on the predictive failure flashdisk has been successfully dropped from the associated ASM diskgroup.

C.Drop the flashcache on the cell and re-create it using all but the predictive failure flashdisk.

D.Safely power off the cell containing the predictive failure flashdlsk.

E.Replace the predictive failure flashdisk.

F.Power up the cell containing the replaced flashdlsk and activate all grlddlsks.

G.Drop the flashcache on the cell and re-create it using all flashdlsks.

H.Create a new griddisk on the replaced flashdisk.

I.Add the griddisk back into the ASM diskgroup to which it belonged.

Explanation:Note:*Exadata monitors for the number of media and other disk/flash failures (e.g. an I/O write failuredue to physical media damage). If there are too many of those, Exadata is ‘predicting’ that it willsoon fail and it takes it out of the system.*Exadata Server, that runs on the storage cells, monitors disk health and performance. If the diskperformance degrades it can put it into proactive failure mode. It also monitors for predictivefailures based on the disk’s SMART (Self-monitoring, Analysis and Reporting Technology) data. Inboth cases, the Exadata Server notifies XDMG to take those disks offline.When a faulty disk is replacedf on the storage cell, the Exadata Server will recrate all grid disks ona new disk. It will then notify XDMG to bring those grid disks online or add them back to diskgroups, in case they were already dropped.*ASM is a critical component of the Exadata software stack. It is also a bit different – compared tonon-Exadata environments. It still manages your disk groups, but builds those with grid disks. Itstill takes care of disk errors, but also handles predictive disk failures. It doesn’t like externalredundancy and ACFS, but it makes the disk group smart scan capable.

Which two are true concerning the allocation of I/O resources by the IORM within the CELLSRV process?

Posted by seenagape on September 23, 2013 2 comments

Which two are true concerning the allocation of I/O resources by the IORM within the CELLSRVprocess?

A.If two consumer groups A and B in the PROD database get 10% and 15% respectively of resource allocation, then the percentage of I/O resource would be the same if they got 20% and 30% respectively, provided that the category plans and inter database plans are unchanged, and consumer groups A and B are still mapped to the same category.

B.If two consumer groups C and D In the PROD database get 10% and 15% respectively of resource allocation, then the percentage of I/O resource would be the same if they still got 10% and 15% respectively and were remapped to a different category by the DBA, provided that the category plans and Interdatabase plans are unchanged.

C.If two consumer groups P and Q In the PROD database get 20% and 10% respectively of resource allocation, then the percentage of I/O resource would be the same if they got 10% and 5% respectively, and the Interdatabase plan has changed, provided that the category plan is unchanged, and consumer groups A and B are still mapped to the same categories.

D.Log Writer I/O and Control File I/O are high priority I/O managed automatically by IORM.

E.Database Writer I/O is considered to be the highest priority I/O and is managed based on attributes of the IORM plan.

Explanation:*(not A, Not B)Rules in an interdatabase resource plan specify allocations todatabases, not consumer groups.*IORM RulesIORM is only “engaged” when needed./ (D)Redo and control file writes always take precedence./ (Not E)DBWR(database writer)writes are scheduled at the same priority as user IO./IORM does not intervene if there is only one active consumer group on one database./Any disk allocation that is not fully utilized is made available to other workloads in relation to theconfigured resource plans./Background IO is scheduled based on their priority relative to user IO./For each cell disk, each database accessing the cell has one IO queue per consumer group andthree background queuesNote:*Use IORM metrics to track/I/O load per Consumer Group (IOPS, MBPS, disk utilization %)/I/O throttling per Consumer GroupReference:Using IORM with Exadata

Which three Exadata features may help to improve the performance of this OLTP workload?

Posted by seenagape on September 23, 2013 1 comment

You plan to migrate a database supporting an an OLTP workload to your Database MachineThis is part of a consolidation project and several other databases already exist on the DatabaseMachine.Which three Exadata features may help to improve the performance of this OLTP workload?

A.Hybrid Columnar Compression

B.I/O Resource Manager

C.Smart Flash Cache

D.Smart Flash Log

E.Smart Scan

F.Storage Index

Explanation:C:OLTP performance benefits with Exadata/(D)Smart flash log for low latency commits

/ (C)Smart flash cache for low latency reads. KEEP in Flash forcritical objects

Which are the two guidelines for installing this configuration in your data Center?

Posted by seenagape on September 23, 2013 7 comments

You are planning the physical installation of two full rack Database Machines and two full-rackexpansion racks. The four racks will be combined into one multi rack system.Which are the two guidelines for installing this configuration in your data Center?

A.All Database Machines must be placed side by side with no space between them.

B.All Expansion Racks must be placed side by side with no space between them.

C.All racks must be placed in such a way that the exhaust air of one rack does not enter the air inlet of another

D.All racks must be placed side by side with no space between them.

E.All racks must be isolated from each other with at least one meter between them.

F.Racks may be placed as required in the machine room.

G.Expansion Racks must be placed side by side at least one meter apart.

Explanation:A:Group related racks together – for example, racks that run a common database orare part of a common clusterC:Inadequate cold air flow could result in higher air inlet temperatures in the servers due to exhaustair recirculation