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Status Not under consideration
Created by Guest
Created on Apr 12, 2023

CSM - Automatically Synchronise Standby Server Sessions After IPL.

We have two DS8000 Controllers in a full MM - Hyperswap Configuration.

We have two CSM Sessions running on two different LPARS in our SYSPLEX.

( LPAR1 (Primary ) and LPAR2 (Standby) )

We observe that after IPL of the LPAR2 ( Configured as the Standby Server ) they CSM Standby Server will not automatically Synchronise with the Primary & Active Server.

Is it Possible have the Standby Server to Automatically Synchronise with the ACTIVE Primary CSM server ( defined in the Connections ).

Idea priority Low
  • Guest
    Apr 12, 2023
    The reason the servers do not resync automatically is that it's difficult to tell whether the loss of connection is due to a planned IPL like you ran, or an actual issue that might cause intermittent disconnections. In the latter case we might end up attempting a sync and fail to fully synchornize the standby server causing the standby to be in an inconsistent state.

    So manual resync is necessary so that the customer can ensure us that a resync should be possible and that the cause of the disconnect is not due to an actual disaster.

    There are other RFEs around creating an active active type configuration for the CSM servers. I would suggest voting for that RFE if you have not already as I hope to have a way to handle this request better when we get to that type of design.