. 5.1
Charlotte User Group Meeting
November 01, 2011
© Copyright IBM Corporation 2011
IMS Database Recovery
Charles Jones Senior Software Engineer
IMS Database Support
Silicon Valley Laboratory
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 2
Recovery Topics
• Recovery Overview – Recovery Design
– Backout / Recovery Utilities
• System Recovery – System failures
– System Restart options
– Recovery processing terminology
• Batch Backout – Finding active work / PSBs
– Running Batch Backout
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 3
IMS Recovery Overview
• In its simplest form:
– Restoring the database from a backup.
• In its most complex form:
– Restoring the database from a backup and applying all the
updates since that time in the same sequence, thus preserving
the integrity of the database.
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 4
IMS Recovery Design
• Recover from media failures
• Unstable environments
– site failure
– software failure
• Whole system outages
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 5
IMS Recovery Design
• Processing was in a single environment
– Online
– Batch
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 6
IMS Recovery Design
• Online
– Offices closed at night
– No ATMs
– No Internet access
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 7
IMS Recovery Design
• Batch
– DLIBATCH - few BMPs
– Single threaded application processing
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 8
IMS Recovery Design
• Defined application processing environments – Periods of Online
– Predetermined backup points
– Defined batch processing
– Second backup point (optional)
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 9
IMS Recovery Design
• Online Processing – Single log stream
• Many OLDS/SLDS • Single recovery stream
– Transaction failures handled by Dynamic Backout
– Recovery point is prior to allocation time
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011
IMS Recovery Design
IMS1
IMS3
IMS2
IMS4
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 11
Backup / Recovery Utilities
• Database Image Copy (Batch, Online or Concurrent) – Creates copies of database data sets
• Database Change Accumulation – Creates data set containing only log records needed for Recovery
– Sequenced by RBA within data set and database
– Reduces time required for Recovery
• Database Recovery – Recovers damaged database data set
– Updates copy of database data set with changes logged after the
copy was made
• Batch Backout – Removes database changes made during execution of a batch
program or an online PSB
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 12
Recovery Processing
• Terminology
– Full Recovery
– Time Stamp Recovery
– Point in Time Recovery
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 13
Recovery Processing
• Terminology – Full Recovery
• Recovery to the latest updates
• Complete recovery using all the logs with updates on them
• Normally run for media failures
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 14
Recovery Processing
• Terminology – Timestamp Recovery
• To any point where the database is not allocated
• Recovery using the logs with updates on them
• Normally run for application failures
• No recovery point in the middle of an online session unless the
database has been /DBR‟d
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 15
Recovery Processing
• Terminology – Point In Time Recovery
• To any point
• Recovery using partial logs
• All updates (UOW) commit at exact timestamp are included
• Normally run for application failures
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 16
Change Accumulation
• Accumulating batch logs
DB
RECOVERY
CA1
RECOVERED
DATA SET
CA2
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 17
IMAGE
COPY IMAGE
COPY
Recovering a Database
DB
RECOVERY
RECOVERED
DATABASE
DATA SET
RLDS2
RLDS1
CA1
RECONS
DBRC
GENJCL.RECOV
IMAGE
COPY
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 18
Recovery Processing
● Performing Recovery Processing
– Listing Recovery information
– Generating Recovery jobs
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 19
Listing Recovery Information
//DBRC EXEC DSPURX00
//STEPLIB DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR
//DFSRESLB DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR
//IMS DD DSN=&CLASSID..CMXXX.DBDLIB,DISP=SHR
//JCLPDS DD DSN=&CLASSID..CMXXX.JCLLIB,DISP=SHR
//JCLOUT DD SYSOUT=(*,INTRDR)
//SYSPRINT DD SYSOUT=*
//SYSIN DD *
LIST.DB DBD(T01DBD1) DBDS
/*
LIST.DB DBD( ) – will display the DB record only
LIST.DB DBD( ) DBDS – will display the DB, DBDS and all
associated records (ALLOC,IC,RECOV,REORG…
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 20
Using GENJCL.RECOV to Recover a Database
//DBRC EXEC DSPURX00 //STEPLIB DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR //DFSRESLB DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR //IMS DD DSN=&CLASSID..CMXXX.DBDLIB,DISP=SHR //JCLPDS DD DSN=&CLASSID..CMXXX.JCLLIB,DISP=SHR //JCLOUT DD SYSOUT=(*,INTRDR) //SYSPRINT DD SYSOUT=* //SYSIN DD * GENJCL.RECOV DBD(T01DBD1) ONEJOB JOB(T01RCJOB) LIST RCVTIME(timestamp)
Member which contains the JOB card
DBD name to be recovered (could be group name)
GROUP(grpname) can be used instead of DBD
List the created JCL in SYSPRINT
Create only one IC JOB
. 5.1
Charlotte User Group Meeting
November 01, 2011
© Copyright IBM Corporation 2011
System Recovery
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 22
System Recovery Overview
• System Failures
• System Restart Options – Emergency Restart
• OVERRIDE
• COLDCOMM
• COLDBASE
• COLDSYS
• Dynamic Backout
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 23
System Failures
• IMS system abends
– IMS Uxxx
• IMS SUBSYS record shows ABNORMAL TERM=ON
• Dynamic Backout invoked
• MVS failures:
– IMS SUBSYS record shows ABNORMAL TERM=OFF
– No Dynamic Backout invoked
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 24
Results of Failed System
• Results of a failed IMS system Include
– SUBSYS record exists in RECON
SSYS
SSID=IMSG LOG START=07.200 18:18:12.0
SSTYPE=ONLINE ABNORMAL TERM=ON RECOVERY STARTED=NO BACKUP=NO
TRACKED=NO TRACKER TERM=OFF SHARING COVERED DBS=NO
IRLMID=**NULL** IRLM STATUS=NORMAL GSGNAME=**NULL**
COEXISTENCE LEVEL=10.1
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 25
Results of Failed System
• Results of a failed IMS system Include
– OLDS is open
LIST.LOG OPEN SSID(IMSG)
PRIOLD
SSID=IMSG # DD ENTRIES=1
EARLIEST CHECKPOINT = 07.200 18:18:15.4
DDNAME=DFSOLP01 DSN=IMSVS.IMSG.OLP01
START = 07.200 19:40:17.3 FIRST DS LSN= 00000000003EFE52
STOP = 00.000 00:00:00.0 LAST DS LSN= 0000000000000000
LOCK SEQUENCE# = 000000000000
STATUS=ACTIVE FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0
VERSION=9.1
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 26
Results of Failed System
• Results of a failed IMS system Include
– PRILOG record is open
PRILOG RECORD SIZE= 3984
START = 07.200 18:18:12.0 * SSID=IMSG VERSION=9.1
STOP = 00.000 00:00:00.0 #DSN=24
GSGNAME=**NULL**
FIRST RECORD ID= 0000000000000001 PRILOG TOKEN= 0
EARLIEST CHECKPOINT = 07.200 18:18:12.0
DSN=IMSVS.IMSG.SLDS.G0030V00 UNIT=3390
START = 07.200 18:18:12.0 FIRST DS LSN= 0000000000000001
STOP = 07.200 18:19:31.6 LAST DS LSN= 00000000000A78C8
FILE SEQ=0001 #VOLUMES=0001
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 27
System Restart Options
• Emergency Restart (/ERE )
– OVERRIDE – SUBSYS record already exists
– COLDCOMM – “clean start” for DC, “warm start” for DB
– COLDBASE – “clean start” for DB, “warm start” for DC
– COLDSYS - “clean start” for whole system
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 28
System Restart Options
• OVERRIDE. – Required if SUBSYS record is present and ABNORMAL TERM=OFF – Will overwrite running IMS system
• IMS restarts using the same SUBSYS record – Continues DBRC AUTHORIZATIONS already held – PRILOG record is maintained – Performs dynamic back-outs for all active PSBs – OLDS can be open or closed
• OLDS will be closed • Archive job submitted to archive closed OLDS
– On completion of Dynamic backout • OLDS Archived • PRILOG closed and new one opened • Releases DB authorization
SSYS
SSID=IMSG LOG START=07.200 18:18:12.0
SSTYPE=ONLINE ABNORMAL TERM=OFF RECOVERY STARTED=NO BACKUP=NO
TRACKED=NO TRACKER TERM=OFF SHARING COVERED DBS=NO
IRLMID=**NULL** IRLM STATUS=NORMAL GSGNAME=**NULL**
COEXISTENCE LEVEL=10.1
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 29
System Restart Options
• Use COLDCOMM. when: – Normal ERE failed and message not critical to the business
– Can‟t get IMS to rebuild the IMS Queues
– You have a tool to RE-QUEUE the messages
• IMS restarts using the same SUBSYS record – Continues DBRC AUTHORIZATIONS already held
– PRILOG record is maintained
– Performs dynamic back-outs for all active PSBs
– OLDS can be open or closed
– On completion of Dynamic backout • OLDS Archived
• PRILOG closed and new one opened
• Releases DB authorization
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 30
System Restart Options
• Use COLDBASE. when: – Normal ERE failed and database updates to be handled by
Batch Backout
– IMS will maintain the IMS Queues
• IMS restarts using the same SUBSYS record – Continues DBRC AUTHORIZATIONS already held
– Dynamic database back-outs bypassed
– PRILOG record is maintained
– BKOUT record(s) are written for BMP PSBs
– Databases STOPPED by IMS for BMP PSBs
– OLDS can be open or closed
– On completion of COLDBASE • OLDS Archived
• PRILOG closed and new one opened
• Releases DB authorization
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 31
System Restart Options
• Use COLDSYS. when: – Normal ERE failed and database updates to be handled by Batch
Backout and the message queues are not required
• IMS restarts using the same SUBSYS record – DBRC AUTHORIZATIONS already held – released
– PRILOG record closed and new one opened
– IRLM locks released
– OLDS MUST be closed manually before /ERE
DFS034I DATA BASE AUTHORIZATION AND LOCKS RELEASED. IMSG
DFS034I DATA BASE AUTHORIZATION AND LOCKS RELEASED. IMSG
DFS034I DATA BASE AUTHORIZATION AND LOCKS RELEASED. IMSG
DFS994I *COLDSYS* EMERGENCY START COMPLETED. IMSG
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 32
System Restart Options
• Restarting Failed IMS System – BEST OPTION:
• ABNORMAL TERM=ON (enter /ERE)
• ABNORMAL TERM=OFF (enter /ERE OVERRIDE)
• IMS Restart (/ERE) Failed – Choices :
• Do we NEED to maintain the message queues? – No: - /ERE COLDCOMM.
– Yes: - /ERE COLDBASE.
• If Neither COLDCOMM or COLDBASE works – Close the OLDS
– /ERE COLDSYS
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 33
Dynamic Backout
• Invoked by ERE
• Invoked by START DB command
• Available in DLIBATCH if BKO=Y and DASD log used
• Successful Backout: – Reads logs to identify active PSBs with uncommitted UOW
– Updates DB with „reversing‟ update
– Logs new updates to OLDS or IEFRDER for future forward recovery
requirements
• Unsuccessful Backout : – Stops DB (online)
– Creates BKOUT record in RECON
– Updates DBDS record with BACKOUT NEEDED=Y
. 5.1
Charlotte User Group Meeting
November 01, 2011
© Copyright IBM Corporation 2011
Batch Backout
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 35
Find the OPEN OLDS
• SSID parameter is needed only if there are multiple IMS
systems sharing the RECON as in a data sharing environment.
• Include LIST.LOG SSID(xxxx) to get the complete PRIOLD
history so that when you close the OLDS you can see the
previous OLDS. (next slide)
LIST.LOG OPEN SSID(IMSG)
PRIOLD
SSID=IMSG # DD ENTRIES=1
EARLIEST CHECKPOINT = 07.200 18:18:15.4
DDNAME=DFSOLP01 DSN=IMSVS.IMSG.OLP01
START = 07.200 19:40:17.3 FIRST DS LSN= 00000000003EFE52
STOP = 00.000 00:00:00.0 LAST DS LSN= 0000000000000000
LOCK SEQUENCE# = 000000000000
STATUS=ACTIVE FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0
VERSION=9.1
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 36
Find the OPEN OLDS
LIST.LOG SSID(IMSG)
PRIOLD
SSID=IMSG # DD ENTRIES=6
EARLIEST CHECKPOINT = 07.200 18:18:15.4
DDNAME=DFSOLP02 DSN=IMSVS.IMSG.OLP02
START = 07.200 18:33:56.9 FIRST DS LSN= 00000000000AB774
STOP = 07.200 19:38:25.6 LAST DS LSN= 0000000000152CD2
LOCK SEQUENCE# = 000000000000
STATUS=ARC COMPLT FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0 ARCHIVE JOB NAME=IMSGARCH
VERSION=9.1
DDNAME=DFSOLP03 DSN=IMSVS.IMSG.OLP03
START = 07.200 19:38:25.6 FIRST DS LSN= 0000000000152CD3
STOP = 07.200 19:38:53.7 LAST DS LSN= 00000000001FA43C
LOCK SEQUENCE# = 000000000000
STATUS=ARC COMPLT FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0 ARCHIVE JOB NAME=IMSGARCH
VERSION=9.1
DDNAME=DFSOLP04 DSN=IMSVS.IMSG.OLP04
START = 07.200 19:38:53.7 FIRST DS LSN= 00000000001FA43D
STOP = 07.200 19:39:20.8 LAST DS LSN= 00000000002A17D4
LOCK SEQUENCE# = 000000000000
STATUS=ARC COMPLT FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0 ARCHIVE JOB NAME=IMSGARCH
VERSION=9.1
DDNAME=DFSOLP05 DSN=IMSVS.IMSG.OLP05
START = 07.200 19:39:20.8 FIRST DS LSN= 00000000002A17D5
STOP = 07.200 19:39:48.8 LAST DS LSN= 0000000000348B18
LOCK SEQUENCE# = 000000000000
STATUS=ARC COMPLT FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0 ARCHIVE JOB NAME=IMSGARCH
VERSION=9.1
DDNAME=DFSOLP99 DSN=IMSVS.IMSG.OLP99
START = 07.200 19:39:48.8 FIRST DS LSN= 0000000000348B19
STOP = 07.200 19:40:17.3 LAST DS LSN= 00000000003EFE51
LOCK SEQUENCE# = 000000000000
STATUS=ARC COMPLT FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0 ARCHIVE JOB NAME=IMSGARCH
VERSION=9.1
DDNAME=DFSOLP01 DSN=IMSVS.IMSG.OLP01
START = 07.200 19:40:17.3 FIRST DS LSN= 00000000003EFE52
STOP = 00.000 00:00:00.0 LAST DS LSN= 0000000000000000
LOCK SEQUENCE# = 000000000000
STATUS=ACTIVE FEOV=NO AVAIL
PRILOG TIME=07.200 18:18:12.0
VERSION=9.1
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 37
Close the OLDS
• Run DBRC command
– GENJCL.CLOSE SSID(IMSG) LIST
• Run DFSULTR0 in CLS mode
– DFSOLP – OLDS to be closed
– DFSPOLP – Previous OLDS
– DFSWADS0 – WADS
– SYSIN DD * • CLS
• /*
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 38
Find the Active PSBs
• Run DFSULTR0 – SYSIN
• PSB
– IEFRDER • IMSVS.IMSG.OLP01 – OLDS just closed
***** RECOVERY REQUIREMENTS *****
PSB NAME RECOVERY TOKEN DATABASE DSID ACTION REQUIRED
B1ACSTA
IMSG 0000001700000000 BACKOUT IS REQUIRED
NO DATABASE NAMES FOUND
DBNAME LIST MAY BE INCOMPLETE
IMSG 0000001800000000 BACKOUT IS REQUIRED
NO DATABASE NAMES FOUND
DBNAME LIST MAY BE INCOMPLETE
B1ACSTP
IMSG 0000001B000000D7 BACKOUT IS REQUIRED
B1CST04 -
B1UPPRDA
IMSG 0000001600000000 BACKOUT IS REQUIRED
NO DATABASE NAMES FOUND
DBNAME LIST MAY BE INCOMPLETE
END OF REPORT
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 39
Listing the Failed Subsystem
• LIST.SUBSYS ALL or LIST.SUBSYS SSID(xxxx) LIST.SUBSYS ALL
07.200 19:41:23.0 LISTING OF RECON PAGE 0008
-------------------------------------------------------------------------------
SSYS
SSID=IMSG LOG START=07.200 18:18:12.0
SSTYPE=ONLINE ABNORMAL TERM=ON RECOVERY STARTED=NO BACKUP=NO
TRACKED=NO TRACKER TERM=OFF SHARING COVERED DBS=NO
IRLMID=**NULL** IRLM STATUS=NORMAL GSGNAME=**NULL**
COEXISTENCE LEVEL=10.1
AUTHORIZED DATA BASES/AREAS=19 VERSION=9.1 XRF CAPABLE=NO
ENCODED
-DBD- -AREA- -LEVEL- -ACCESS INTENT- -STATE-
B1PRD01 **NULL** 3 UPDATE 6
B1PRD02 **NULL** 3 UPDATE 6
B1PRD03 **NULL** 3 UPDATE 6
B1PRD05 **NULL** 3 UPDATE 6
B1PRD06 **NULL** 3 UPDATE 6
B1CST01 **NULL** 3 UPDATE 6
B1CST02 **NULL** 3 UPDATE 6
B1CST03 **NULL** 3 UPDATE 6
B1CST04 **NULL** 3 UPDATE 6
B1CST05 **NULL** 3 UPDATE 6
B1CST06 **NULL** 3 UPDATE 6
B1CST07 **NULL** 3 UPDATE 6
B1CST08 **NULL** 3 UPDATE 6
B1CST09 **NULL** 3 UPDATE 6
B1CST10 **NULL** 3 UPDATE 6
B1PRD07 **NULL** 3 UPDATE 6
B1PRD08 **NULL** 3 UPDATE 6
B1PRD09 **NULL** 3 UPDATE 6
B1PRD10 **NULL** 3 UPDATE 6
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 40
Find the Active PSBs
//DFSULTR0 EXEC PGM=DFSULTR0,PARM='IMSID=IMSG,DBRC=YES'
//STEPLIB DD DSN=IMSVS.IMSG.SDFSRESL,DISP=SHR
//DFSRESLB DD DSN=IMSVS.IMSG.SDFSRESL,DISP=SHR
//SYSPRINT DD SYSOUT=*
//IEFRDER DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0011V00
// DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0012V00
// DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0013V00
// DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0014V00
// DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0015V00
// DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0016V00
// DD DISP=SHR,DSN=IMSVS.IMSG.OLP01
//SYSIN DD *
PSB
/*
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 41
Find the Active PSBs
***** RECOVERY REQUIREMENTS ***** PSB NAME RECOVERY TOKEN DATABASE DSID ACTION REQUIRED ________ ________________________ ________ _____ _____________________ B1ACSTA IMSG 0000001700000000 BACKOUT IS REQUIRED B1CST08 - B1CST09 - B1PRD07 - B1PRD08 - IMSG 0000001800000000 BACKOUT IS REQUIRED B1CST06 - B1CST07 - B1PRD07 - B1ACSTP ________ IMSG 0000001B000000D7 BACKOUT IS REQUIRED B1CST04 - B1UPCSTA ________ IMSG 0000001A00000000 BACKOUT IS REQUIRED B1CST01 - B1UPPRDA ________ IMSG 0000001600000000 BACKOUT IS REQUIRED B1PRD02 - END OF REPORT
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 42
Running Batch Backout
• BBO has to be run for each PSB listed in the active PSB
report from DFSULTR0
• BBO can be run after the IMS system has been brought up
with a COLDBASE
– BKOUT record should be written by IMS restart
• If NO BKOUT records
– BBO will still run and back out updates for PSB named
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 43
Run Batch Backout
• LIST.BKOUT ALL will list the BKOUT records
BACKOUT
SSID=IMSG #UORS=3
RECOVERY TOKEN=C9D4E2C7404040400000001B000000D7
TIME=07.204 21:34:56.0 PSB=B1ACSTP
CANDIDATE INFLT BMP COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1CST04 NO NO
RECOVERY TOKEN=C9D4E2C7404040400000001A00000000
TIME=07.204 21:30:02.5 PSB=B1UPCSTA
CANDIDATE INFLT COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1CST01 NO NO
RECOVERY TOKEN=C9D4E2C7404040400000001600000000
TIME=07.204 21:30:02.5 PSB=B1UPPRDA
CANDIDATE INFLT COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1PRD02 NO NO
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 44
BBO Log inputs
BACKOUT
SSID=IMSG #UORS=3
RECOVERY
TOKEN=C9D4E2C7404040400000001B000000D7
TIME=07.204 21:34:56.0 PSB=B1ACSTP
CANDIDATE INFLT BMP COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1CST04 NO NO
RECOVERY TOKEN=C9D4E2C7404040400000001A00000000
TIME=07.204 21:30:02.5 PSB=B1UPCSTA
CANDIDATE INFLT COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1CST01 NO NO
RECOVERY TOKEN=C9D4E2C7404040400000001600000000
TIME=07.204 21:30:02.5 PSB=B1UPPRDA
CANDIDATE INFLT COLDEND
ASSOCIATED DATA BASES=1
BACKED DYN BKOUT
-DBD- -OUT - -FAILURE-
B1PRD02 NO NO
DSN=IMSVS.IMSG.SLDS.G0012V00 UNIT=3390
START = 07.204 21:29:58.1 FIRST DS LSN= 00000000000AAFAE
STOP = 07.204 21:33:01.4 LAST DS LSN= 0000000000152A77
DSN=IMSVS.IMSG.SLDS.G0015V00 UNIT=3390
START = 07.204 21:33:58.2 FIRST DS LSN= 00000000002A15D5
STOP = 07.204 21:34:26.6 LAST DS LSN= 00000000003489DE
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 45
Run Batch Backout
• The logs are supplied in the following order: – The oldest log required in time sequence (earliest time) on the
IEFRDER DD
– Every log from the first to the recently closed last log on IMSLOGxx
DD cards.
– The IMSLOGxx start from 01 and go as high as needed.
– The logs can be the OLDS or their archived SLDS
– The OLDS must be closed to be usable by BBO
• The IEFRDER Log file created by BBO is required as it might
be needed by forward recovery should one be needed.
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 46
Run Batch Backout
//BBO EXEC PGM=DFSRRC00,REGION=8M,
//
PARM=(DLI,DFSBBO00,B1ACSTA,,0000,,0,,N,0,T,,N,Y,,,Y)
//STEPLIB DD DSN=IMSVS.IMSG.SDFSRESL,DISP=SHR
// DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR
//DFSRESLB DD DSN=IMSVS.IMS910.SDFSRESL,DISP=SHR
//IMSLOGR DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0011V00
//IMSLOG01 DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0012V00
//IMSLOG02 DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0013V00
//IMSLOG03 DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0014V00
//IMSLOG04 DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0015V00
//IMSLOG05 DD DISP=SHR,DSN=IMSVS.IMSG.SLDS.G0016V00
//IMSLOG06 DD DISP=SHR,DSN=IMSVS.IMSG.OLP01
//IEFRDER DD DSN=IMSVS.IMSG.SLDS(+1),
//
SPACE=(TRK,(100,10),RLSE),UNIT=SYSDA,DISP=(NEW,CATLG),
// DCB=(DPR.IMSB.OLP00,BUFNO=20)
//IMS DD DISP=SHR,DSN=hlq.CMXXX.DBDLIB
// DD DISP=SHR,DSN=hlq.CMXXX.PSBLIB
//SYSIN DD *
COLDSTART
Charlotte User Group - Nov. 01 © Copyright IBM Corporation 2011 47
Run Batch Backout
• If there was No BKOUT record when BBO run the following
message will be produced.
• It is not saying that the BBO is not valid or did not work, just
that there was no BKOUT to start with.
03.09.43 J0030824 +DFS035I BATCH INITIALIZATION COMPLETE GIMS
03.10.55 J0030824 +DFS3293W PERFORMED BACKOUT NOT NEEDED
03.10.56 J0030824 +DFS092I IMS LOG TERMINATED GIMS
. 5.1
Charlotte User Group Meeting
November 01, 2011
© Copyright IBM Corporation 2011
Questions?