IBM V7.2 manual Split-Mirror online backup scenario

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Split-Mirror online backup scenario

This scenario starts with the SAP R/3 system TS1 running on the Primary server. The Backup server has TS1 stopped and DB2 file systems for data and logs unmounted.

Attention: This scenario is currently not supported for databases that contain SMS tablespaces.

1.NFS-mount the log directory of the system where you want to restore the backup and configure the SAP DB2 userexit program so that it copies the log files to this directory: in the configuration file initTS1.db6 in the directory /usr/sap/TS1/SYS/global set the value of the variable DB2DB6_STANDBY_DIR to the NFS-mounted log directory of the target system. For more details on how to configure the SAP DB2 administration tools please refer to the SAP manual SAP Database Administration Guide: IBM DB2 Universal Database for UNIX and Windows that is available at http://service.sap.com/installguides.

2.Issue the suspend command on the Primary database:

db2 “connect to ts1”

db2 “set write suspend for database”

3.Execute the FlashCopy task ts1db from the Primary server as root user:

/usr/opt/ibm2105cli/rsExecuteTask.sh –v –s ESSCSS ts1db

Wait for rsExecuteTask to return.

Note: If you are at DB2 UDB V7 FP4 and above, you do not have to copy the logs for this scenario

4.Issue the resume command from the same connection as used in Step 2: db2 “set write resume for database”

5.Mount the data and log filesystems on the Backup server:

mount /db2/TS1/db2ts1/NODE0000 mount /db2/TS1/sapdata1 mount /db2/TS1/sapdata2 mount /db2/TS1/sapdata3 mount /db2/TS1/sapdata4 mount /db2/TS1/sapdata5 mount /db2/TS1/sapdata6 mount /db2/TS1/sapdata7 mount /db2/TS1/log_dir

Note: If you are on DB2 UDB V7 FP4 and above, you do not need to mount the /db2/TS1/log_dir file system.

6.Start the DB2 instance on the Backup server: db2start

Split-Mirror Online Backup Scenario

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Contents October Page AIX DB2 TrademarksTable of contents Abstract About the authors DB2 UDB suspended I/O overview Set write suspend DB2 UDB commandsSet write resume Db2inidbDB2 UDB commands Overview of IBM 2105 Enterprise Storage Server Overview of Copy Services Overview of FlashCopy Overview of the ESS Copy Services Web interface Overview of ESS Command Line Interface CLI ESS Copy Services CLI command description Usr/sap SID trans SAP softwarePage Conceptual overview Sample configuration of SAP R/3 with DB2 UDB and IBM ESSInstalling the Command Line Interface on AIX Installing Advanced Copy ServicesCreating and assigning ESS logical volumes Cd /usr/opt/ibm2105cli RsList2105s.sh Lsdev -C grepConfiguring a system with two hosts ESS volumes Logical subsystem Configuring a Two Host System Create volume groups # smit vg -Add a Volume GroupCreate logical volumes Add a Volume GroupMklv -y saplv sapvg #smit lv Add a Logical Volume -VOLUME Group name dbvg#smit fs Create file systemsCrfs -v jfs -d saplv -m /usr/sap -A yes -p rw #smit fs Mount /usr/sap Chfs -a size=14000000 /db2/TS1/db2ts1/NODE0000Chown ts1admsapsys /usr/sap Usr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss Ts1sap Usr/sap/TS1/SYS/profile as followsDb2 catalog db TS1 on /db2/TS1 Db2 set write suspend for database Snapshot database scenarioUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1db Db2inidb ts1 as snapshotSnapshot Database Scenario Usr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1dbdata Standby database scenarioDb2 rollforward database ts1 to end of logs Db2inidb ts1 as standbyUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss Ts1dblog Db2 rollforward database ts1 to end of logs and stop Db2 connect to ts1 Db2 set write suspend for database Split-Mirror online backup scenarioDb2 restore database ts1 from /backupfs Db2 backup database ts1 to /backupfsUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1dbwd Db2 rollforward database ts1 to end of logs and stop orStartsap Db2 set write resume for database Split-mirror restore scenarioDb2inidb ts1 as mirror Mount /db2/TS1/sapdata6 mount /db2/TS1/sapdata7

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