IBM Data and AI Ideas Portal for Customers


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Status Delivered
Workspace Db2 Analytics Accelerator for z/OS
Created by Guest
Created on Sep 30, 2014

RELATED IDEAS

Latency aware query offload decision

BdB has 2 active Accelerators with several replicated tables (meaning 2 subscriptions on CDC z/OS side). BdB already has scripts to synchronize the Load process in both Accelerators, but the replication may have different latencies. When a query on replicated tables is accelerated, it may run in different Accelerators in a short period of time, giving "inconsistent" results due to the latency difference.
I used the term "inconsistent" result here to mean that once the query is resolved with more up-to-date data (short CDC latency), if resolved again with less up-to-date data (long CDC latency) then it is like having its data being "regressed".
A way to solve this would be to have DB2 Optimizer deciding to what accelerator to send the query based on the most up-to-date replication for the given table(s).
  • Guest
    Reply
    |     Jan 10, 2019

    Shipped in V7. 

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