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Status Submitted
Workspace Db2 Analytics Accelerator Loader for z/OS
Created by Guest
Created on Aug 28, 2026

RELATED IDEAS

Replication from Db2 to IDAA in a mixed scenario with Integrated Synchronization and IBM Loader

Accelerated tables can be replicated using Integrated Synchronization when there are no Db2 utilities unsupported by Integrated Synchronization. This approach is particularly valuable for accelerated tables that are updated exclusively through SQL.

IBM Loader is an effective method for replicating tables or partitions when a Db2 utility has modified the data and those changes are not captured in the Db2 log. The DETECT DATA CHANGES option makes IBM Loader highly efficient, as all partitions are evaluated while only those that require loading into IDAA are replicated.

 Although the two replication methods operate effectively when used independently, their integration in a mixed scenario could be significantly improved, particularly when tables are updated both through SQL and through Db2 utilities that are not supported by Integrated Synchronization.

 When an accelerated table is replicated through Integrated Synchronization, all updated partitions are marked as U (Unknown) for IBM Loader. As a result, even when the data has already been correctly replicated by Integrated Synchronization, using IBM Loader with DETECT DATA CHANGES would still load all partitions that have been modified. We consider this unnecessary, as Integrated Synchronization has already replicated the corresponding changes.

When a Db2 utility modifies a partition, sometimes the partition is marked (in the “change category” available through the SYSPROC.ACCEL_GET_TABLES_DETAILS stored procedure) as U (Unknow), R (Recommended) or O (Required). We think that the category U should no be used by utilities.

We would like Db2 and IDAA to be able to distinguish, through different partition markings, between partitions that have been modified at the Db2 level and subsequently replicated by Integrated Synchronization, and partitions that have been modified by a Db2 utility not supported by Integrated Synchronization. In the latter case, replication is interrupted and Integrated Synchronization cannot load the affected data.

If the DETECT DATA CHANGES option in IBM Loader could differentiate between these scenarios, many unnecessary loads into IDAA could be avoided.

Needed By Quarter

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