IBM V7.2 DB2 UDB commands, Set write suspend, Set write resume, Db2inidb, Restart write resume

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DB2 UDB commands

We use the following commands:

set write suspend

The suspend command (db2 set write suspend for database) suspends all write operations to the DB2 UDB database (i.e., to tablespaces and log files). Read operations are not suspended and are thus allowed to continue. Applications can continue to process insert, update, and delete operations utilizing the DB2 bufferpools. A database connection is required for issuing the suspend command. It is recommended that you maintain the current session for executing the subsequent resume command.

set write resume

The resume command (db2 set write resume for database) resumes all write operations to the suspended DB2 UDB database. A database connection is required for issuing the resume command.

db2inidb

The db2inidb command (db2inidb <db_alias> as < snapshot standby mirror >) is required to initialize the copy of the suspended database. You do not require a database connection prior to executing this command. It can be used in the following three cases:

snapshot can be applied to the secondary copy, putting it into a transactionally consistent state.

standby can be applied to the secondary copy, putting it into a rollforward pending state. DB2 logs from the primary database can then be applied to the secondary database.

mirror can be applied to the primary copy after it has been restored from the secondary copy. The primary database will be placed into a rollforward pending state and then DB2 logs can be applied to the primary database.

restart write resume

The restart write resume command (db2 restart db <db_alias> write resume) can be utilized to resume write operations on a suspended database that experienced an abnormal termination.

For further information regarding DB2 UDB’s suspended I/O functionality, see the DB2 UDB documentation and Release Notes provided with V7.2 or V7.1 Fixpack 3 at http://www.ibm.com/cgi- bin/db2www/data/db2/udb/winos2unix/support/v7pubs.d2w/en_main. In addition, see the DB2 Developer Domain article entitled Split Mirror Using Suspended I/O in DB2

DB2 UDB commands

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Contents October Page Trademarks AIX DB2Table of contents Abstract About the authors DB2 UDB suspended I/O overview DB2 UDB commands Set write suspendSet 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 SAP software Usr/sap SID transPage Sample configuration of SAP R/3 with DB2 UDB and IBM ESS Conceptual overviewCreating and assigning ESS logical volumes Installing Advanced Copy ServicesInstalling the Command Line Interface on AIX Lsdev -C grep Cd /usr/opt/ibm2105cli RsList2105s.shConfiguring a system with two hosts ESS volumes Logical subsystem Configuring a Two Host System # smit vg -Add a Volume Group Create volume groupsAdd a Volume Group Create logical volumesAdd a Logical Volume -VOLUME Group name dbvg Mklv -y saplv sapvg #smit lvCreate file systems #smit fsCrfs -v jfs -d saplv -m /usr/sap -A yes -p rw #smit fs Chown ts1admsapsys /usr/sap Chfs -a size=14000000 /db2/TS1/db2ts1/NODE0000Mount /usr/sap Usr/sap/TS1/SYS/profile as follows Usr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss Ts1sapDb2 catalog db TS1 on /db2/TS1 Snapshot database scenario Db2 set write suspend for databaseUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1db Db2inidb ts1 as snapshotSnapshot Database Scenario Standby database scenario Usr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1dbdataUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss Ts1dblog Db2inidb ts1 as standbyDb2 rollforward database ts1 to end of logs Db2 rollforward database ts1 to end of logs and stop Split-Mirror online backup scenario Db2 connect to ts1 Db2 set write suspend for databaseDb2 backup database ts1 to /backupfs Db2 restore database ts1 from /backupfsUsr/opt/ibm2105cli/rsExecuteTask.sh -v -s Esscss ts1dbwd Db2 rollforward database ts1 to end of logs and stop orStartsap Split-mirror restore scenario Db2 set write resume for databaseMount /db2/TS1/sapdata6 mount /db2/TS1/sapdata7 Db2inidb ts1 as mirror

V7.2 specifications

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