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RECOVERYRECOVERY

Online DB2 Utilities

Author : Debaranjan Sahoo

Reference : IBM utility reference/Admin Guide

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W hat requires recovery ?

DB2 DataDB2 CatalogDB2 DirectoryDB2 Objects

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W hat DB2 objects can be recovered ?

Table spaces Index spaces Indexes Partitions of a Table space Individual Dataset Pages within an error range Individual Pages

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Triggers for a recovery ?

Application Failure

Hardware Failures z/OS Failures Space Failures

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POINT OF DATA RECOVERY

Point of data recovery could be determined usingQUIESCE utility

QUIESCE TABLESPACE DBNAME1.TSNAME1DBNAME2.TSNAME2

Drains all the table spaces one by one and establishes a point of consistency

QUIESCE TABLESPACESET

TABLESPACE db1.ts1TABLESPACE db2.ts2

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Planning for recovery

Report RECOVERY utility

Recovery history from SYSIBM.SYSCOPYLog ranges from SYSIBM.SYSLGRNXVOL-SER numbers of archive logs and BSDSVOL-SER numbers of image copy dataset

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Authorizations for recovery

RECOVERDB privilege on the databaseDBADM or DBCTRL authority on the databaseSYSCTRL or SYSADM authorityInstallation SYSOPR on DSNDB01 or DSNDB06

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Execution phases of Recovery

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RECOVERY options

TOCOPYTOLASTCOPY

TOLASTFULLCOPYTORBATOLOGPOINT

POINT IN TIME RECOVERY

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Datasets used by RECOVER

SYSIN : Input dataset that contains the utility controlstatement

SYSPRINT : Output dataset for messages

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Recovery : Examples

RECOVER TABLESPACE DBNAME1.SPACENAM1

RECOVER TABLESPACE DSN8D81A.DSN8S81D DSNUM 2

RECOVER TABLESPACE DSN8D81A.DSN8S81D DSNUM 1 TOLASTCOPY

RECOVER TABLESPACE DSN8D81A.DSN8S81E DSNUM 2

TABLESPACE DSN8D81A.DSN8S81D

TOLOGPOINT X 00000551BE7D

RECOVER INDEX ADMF001.IADH082P REUSE TOLASTFULLCOPY

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Hands-On exercises

1. Using RC/Migrator migrate 5 table space fromDatabase MFD1 to a local database

2. Take full image copy of a table space3. Now recover using simple recover or last copy

4. Take Full copy of all the table spaces. Now runQUIESCE . Delete the data from all the tablespaces. Recover using START_RBA. Alsorecover the indexes on the table spaces.