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.