The following describes the flow of data in LTM processing. The LTM performs the following actions, as shown in Figure B-2.
Scans the primary database log and forwards transaction log records to the primary Replication Server (PRS in the figure) involving tables that are marked for replication.
Filters out records written by the database maintenance user.
This step prevents transactions that are replicated to the primary database from being re-replicated out of the database to other sites.
For applications designed using the redistributed corporate
rollup model, LTM must be started with the -A flag,
which allows replicated transactions to be redistributed as primary
data. See “Redistributed corporate
rollup” on page 14 for more information.
Marks the transaction log so the primary data server (PDS in the figure) does not truncate log records that have not yet been passed for replication. For details, see “Data server log truncation”
