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  • 1.  Optimising CRR fail-over

    Posted 3 days ago

    Hi Folks,

    I'm reading up on CRR... For planned fail-over, the docs state to set the qm.ini for each QM instance on the live site, restart all the QM instances; set the qm.ini on each QM on the secondary site and restart all the QM. This seems a little slow to me and could lead to a good few minutes of down-time ? 

    The only way I can think of optimising it is to set up the new Live site qm.ini and restart them the second I see the original Live sites leader QM come back up - but I don't think I would know which one was the leader QM so, realistically, I'd have to wait for all three of the original live QM to come back up. I'd then restart the new live QM.

    I guess I have two questions really -

    1) anyone got any speedier methods? 

    2) (a minor issue I suspect), if i restart the original live QM one-by-one/slowly do they start to elect a leader because two of think they are still live and so I have  to restart them at pretty much the same time?

    Anyone got experience with CRR in a true prod environment?

    thanks!

    john.



    ------------------------------
    John Hawkins
    Integration Consultant
    ------------------------------


  • 2.  RE: Optimising CRR fail-over

    Posted 3 days ago

    hmm, that doesn't feel right. Could you share the docs page your referring to? You should be able to start by getting the recovery site into a "Pending Live" state, and only then go and update the original live site. 



    ------------------------------
    Kim Clark
    Integration Architect
    IBM
    ------------------------------

    Original Message


  • 3.  RE: Optimising CRR fail-over

    Posted 3 days ago

    Hey Kim,

    I hope the docs are wrong then :-)

    https://www.ibm.com/docs/en/ibm-mq/9.4.x?topic=crr-complete-planned-switchover-native-ha-configuration

    thanks !



    ------------------------------
    John Hawkins
    Integration Consultant
    ------------------------------

    Original Message


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