Determines whether Replication Agent accesses the RSSD of the primary Replication Server to get replication definitions.
true
true – Replication Agent accesses the primary Replication Server RSSD to read replication definitions automatically when it goes from the Admin state to the Replicating state.
false – Replication Agent does not access the primary Replication Server RSSD for replication definitions.
If the value of the use_rssd parameter is true, Replication Agent connects to the RSSD of the primary Replication Server to retrieve replication definitions for the primary database whenever the resume command is invoked.
Each time it retrieves replication definitions, Replication Agent stores the information in a cache. Replication Agent uses the replication definitions stored in its cache when generating LTL to send to the primary Replication Server.
If the Log Transfer Interface (LTI) component encounters an operation for a database object that it does not have cached information for, Replication Agent reconnects to the RSSD to update its replication definition cache.
If a replication definition still cannot be found for the operation, the Replication Agent instance suspends operation and goes to the Admin state.
To replicate Unicode data, you must specify the appropriate Unicode datatype in a replication definition, and you must set the value of the use_rssd parameter to true.
Replication Agent uses the information in replication definitions stored in the RSSD of the primary Replication Server to generate more efficient LTL output, and thus improve throughput in the Log Transfer Interface (LTI) component and throughout the replication system.
Accessing replication definitions in the RSSD enables the LTI component to improve performance by:
Filtering column names from LTL.
When columns are sent in the order specified in the replication definition, column images can be sent without column names, eliminating some overhead from the LTL.
Filtering unneeded columns from LTL.
When columns are sent as specified in the replication definition, column images for unchanged columns need not be sent, eliminating some overhead from the LTL.
Sending data for each column in the datatype specified by the replication definition.
This allows data to be handled more efficiently all the way through the replication system.
Sending database object names in the same character case defined in the replication definitions.
If the value of the use_rssd parameter is false, none of the previously described performance improvements are possible.
If the value of the use_rssd parameter is false, all data goes to the primary Replication Server as char datatype.
If you want to use owner-qualified table names for either primary tables or replicate tables, you must set the value of the use_rssd parameter to true.
