R+/ CHANGE ACCUM
The
R+/CHANGE ACCUM
for Db2 component offers the ability to create new recovery resources. Using these resources with
can significantly streamline normal and disaster recovery processes.
R+/CHANGE ACCUM
extracts and sorts updates from the Db2 log for a designated group of spaces and stores the updates in a file. This file, called a change accumulation file, provides an efficient alternative recovery resource for
to use instead of Db2 log data sets.
R+/CHANGE ACCUM consists of an interactive ISPF interface and a batch utility. You can use the interface to define and create change accumulation groups. A change accumulation group can contain any number of table spaces, partitions, or data sets. Indexes cannot be included in a group, but indexes can be accumulated by specifying INDEXES YES on the SYSIN statement. Groups are stored in the R+/CHANGE ACCUM repository. You use the R+/CHANGE ACCUM batch utility to routinely generate change accumulation files, because R+/CHANGE ACCUM selects only the log record data that is needed for recovery, it can enhance the speed of recovery processes.
R+/CHANGE ACCUM performs the following:
- Reduces elapsed time required to recover table spaces (and, optionally, their associated indexes).
- Reduces the media requirements for log records.
- Limits shared resources, thereby enabling greater concurrency.
- Increases availability of Db2 data.
- Increases predictability, because recovery time depends only on the resources needed for the spaces being recovered.
For detailed information, see the R+/CHANGE ACCUM documentation.
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