copyright ©2003 digitask consultants inc., all rights reserved cluster concepts digitask seminar...
TRANSCRIPT
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster ConceptsDigitask Seminar November 29, 1999
Digitask Consultants, Inc. [email protected] Brill212-682-6652 [email protected]
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• What is a Cluster ?
• Why Do I Want/Need This ?
• What Is The Cost Benefit ?
• Where Does It Fit In ? (Easily Integrates)
• Seamless Transitions From Non-Clustered Systems (No Service Interruptions)
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
Ethernet
Hub
M em ory C hanne l H ub
F ibre C hanne l S w itch
A lpha S erverA lpha S erver
E nterprise S torage A rray
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• Enterprise Solutions– Highly available 99.999% (About 5 Minutes Of
Unplanned Downtime Per Year.)– Cost Of Downtime May Be Large ! (Direct &
Hidden Costs)– Fast Access To All Resources.– Hardware Scalable, Tailorable & Reliable, To
Your Solution. (Consistent Upgrade Path)
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• Departmental Level
– Highly Available Solutions For Critical Information Delivery.
– Price/Performance Functionality.
– Fast Delivery Systems To End User.
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• End User Level
– Highly Available For Must Have Local Applications.
– Fast Localized Information Processing & Display.
– Dependable RAID Storage At The User Level
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• Three Tiered Client Server Solutions
– Enterprise
– Departmental
– End User
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• Cluster Hardware Management System Components (Servers,
Multiprocessors, Memory) Easier If Homogeneous (Identical Configurations) New Clusters Alpha Systems Typically Large Memory SystemsDepartmental (4100) vs Enterprise (8000 series or
newer)
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• Cluster Hardware Management Interconnects:
CI DSSI FDDIMemory Channel SCSIFibre ChannelEthernet
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts Storage Array
D isk D rive (9 ,16 ,36,72 G B)
Shelf Power Supp ly
D isk C ontro lle rs (H SG 80's)
o 64 - 512 M B o f C ache
o Supports 72 U ltra SC S ID isks
o 36,000 I/O 's Per Second
o F ibre C hannel R uns 200M B Per Second O n
H SG 80 Pair, eg H SG 82
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• OpenVMS Cluster Software Components Data Management -- RMS Relational Database Management -- OracleCluster-wide Utilities -- Show CommandsDistributed Lock Manager -- Allows Shared
Access To Cluster ResourcesDistributed Job Controller -- Allows Cluster
Sharing Of Batch & Print Queues.
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts
• OpenVMS Cluster Software Components Connection Manager --Controls Membership &
Quorum Of Cluster Members System Communication Services (SCS) -- Cluster
Communications Between Nodes (SCA)MSCP & TMSCP Servers -- Allows Local Disks
& Tapes To Be Used Across Cluster.
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts OpenVMSRedundancy Guarantees Availability
VAX 6000VAX 6000
Disk storage
Disk storage
HSCHSC
Ethernet
ALPHA 4100 ALPHA 4100 ALPHA 4100 ALPHA 4100
Mem ory Channel Hub
PCI To Mem ory Channel
PCI To CI
SrorageW orks ArrayMultip le HSJ52's w 4 & 9 GB D isks
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Wide Area Cluster Concepts
• Definition of Wide Area Cluster (WAC)
> Some Nodes Separated from Others
> Implies Separate Computer Facility
> Distance Varies
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Types Of WAC
• Remote Cluster Node• Multi-site Cluster• Disaster Tolerant Cluster
> Duplication Of Hardware
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Wide Area Cluster
ALPRD3(A lpha 4100)
sys.disk
datadisk
datadisk
ALPRD1(A lpha 4100)
ALPRD2(A lpha 4100)
D isk ControllersD isk Drives
Robotic TapeBackup
Subsystem(3 TZ89Tapes)
M ultip le ConnectionsBetween Controllers &
Star Couplers
E thernet
N ew York C ity F inancia lD istrict
Ethernet
Copyright ©2003 Digitask Consultants Inc., All rights reserved
WAC Shadow Data Move
ALPRD3(Alpha 4100)
ALPRD1(Alpha 4100)
ALPRD2(Alpha 4100)
RoboticTape
BackupSubsyst
em(3 TZ89Tapes)
Multiple ConnectionsBetween Controllers &
Star Couplers
Ethernet
N ew York C ity F inancia lD istric t
Ethernet
Data Data DataShadSet
ShadVol
Data DataData
Data Data DataShadVol
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Database Concepts Paul Baumgartel
• Clustered Oracle Parallel Server
– High Availability
– Load Balancing
– Optimized Throughput
– Oracle Version 7 Limitations
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Concepts - Paul Baumgartel
• ORACLE Version 8
– Cache Fusion No More Long I/O Waits
– Faster Inter-Process Communication
– Distributed Lock Manager Integration
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Cluster Summary
• Higher Performance Via Digitask’s Proprietary Methodologies.
• Guaranteed Price/Performance Benefits.
• Non-Intrusive Cluster Management & Platform Upgrades.
• Total Solutions FOR ONE PRICE