The Log Identifier (SSID) must be entered for all configurations.
If the log identifier is set incorrectly, rollback records may not
correspond to the correct LRSN/RBAs when Support_DB2_comp_rec=Y is
used.
Log_identifier=DB0M
a group that has DB1M, DB2M, and DB3M as members
Log_identifier=DB2N
a specific SSID for the DB2, or an SSID within the data-sharing group
If DataSharingOption=Single or DataSharingOption=None,
the Log_identifier can be the SSID of the member or the
data-sharing group.
