DBR
The DBR keyword is valid with the REORG (Online Reorg function) command.
You can specify this option in the environment setup member (DLIGSET0) or in PLUSIN. The following table describes the keyword.
Log switch keyword
To do this | Specify this in PLUSIN |
|---|---|
Switch the online log data sets (OLDS) during the /DBR at the end of the reorganization. | DBR(FEOV) |
Do not switch the OLDS during the /DBR at the end of the reorganization. | DBR(NOFEOV) |
Internal default: DBR(FEOV) | |
The DBR keyword specifies whether to force end-of-volume on the OLDS for the /DBR at the end of the reorganization.
When you specify DBR(FEOV), or accept it as the default, the Online Reorg function issues a /SWI OLDS command to IMS. The FEOV parameter instructs IMS to switch the online log data sets. DBR(FEOV) behaves exactly the same as the IMS command /DBR DB dbdName.
If you specify DBR(NOFEOV), the online log data sets are not switched. DBR(NOFEOV) behaves exactly the same as the IMS command /DBR DB dbdName NOFEOV. Not switching the online log data sets affects recovery time. The Online Reorg function created a batch log, whose time stamps overlap those of an SLDS. If you must recover the database, change accumulation (log merge) is required; this extends the length of the recovery time. However, if you use RECOVERY PLUS for IMS to recover the database, you do not need to run the change accumulation.
For more information, see DBR-commands.
DBR(NOFEOV) is not allowed for IMS 4.1 and earlier.
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