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  • 1.  How to make Application HA to connect to RDQM

    Posted Thu May 04, 2023 02:33 PM

    Is there an option to make the (non-ha) application behave HA based application so that it can connec to a queuemanager in RDQM without break should there be a failover occur.

    Thanks.



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    RAJESH VERMA
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  • 2.  RE: How to make Application HA to connect to RDQM

    Posted Fri May 05, 2023 04:10 AM

    To an application there is no difference between an RDQM HA failover and a standalone queue manager restarting, except perhaps that with an RDQM HA failover, the queue manager may reappear at a different IP address.If an application needs to handle a queue manager restarting then the same approach should work for any kind of failover. See https://www.ibm.com/docs/en/ibm-mq/9.3?topic=managers-application-recovery for details about application recovery



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    John Colgrave
    DR and HA Architect
    IBM MQ
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  • 3.  RE: How to make Application HA to connect to RDQM

    IBM Champion
    Posted Fri May 05, 2023 08:00 AM

    You can achieve application HA as:
    - Assign 2 queue managers to a given application
    - Define queues on both queue managers
    - build CCDT channel using the 2 qmgrs
    - mask the queue manager names, so the app does not know the real qmgr name
    - setup channel afinity etc.. to load balance between the 2 queue managers

    Now when you take down qmgr 1, qmgr 2 is yet available.
    during this time, traffic in transit on qmgr 1 will fail.

    Otherwise, look into uniform cluster.



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    om prakash
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  • 4.  RE: How to make Application HA to connect to RDQM

    Posted Fri May 05, 2023 03:01 PM

    Thank you John and Om!\



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    RAJESH VERMA
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