CDDS_PREFIX in macro DSN6LOGP
The CDDS_PREFIX subsystem parameter specifies the prefix for the name of the data set that contains dictionaries that Db2 uses to decompress compressed log records when a proxy data sharing group in an implementation of the GDPS® Continuous Availability with zero data loss (GDPS Continuous Availability with zero data loss) solution captures the log records on behalf of a source data sharing group. The data set is known as the compression dictionary data set (CDDS).
| Acceptable values: | 1–39 bytes that form a valid z/OS® data set name prefix |
|---|---|
| Default: | DSNCAT |
| Data sharing scope: | All members of the data sharing group must have the same setting. |
| Online changeable: | No |
| DSNZPxxx: | DSN6LOGP.CDDS_PREFIX |
The data set name is formed by appending the string '.CDDS' to the value of CDDS_PREFIX.
This subsystem parameter is used only if the Db2 data sharing group that contains a member that is being installed is part of an implementation of the GDPS Continuous Availability with zero data loss solution.
If CDDS_MODE is set to SOURCE or PROXY, the CDDS must be defined at the source data sharing group and mirrored through peer-to-peer remote copy (PPRC) at the proxy data sharing group.