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  • 1.  RDQM

    Posted Fri April 20, 2018 06:46 AM

    In CD 9.0.4, which will also be available in the next LTS base release, IBM introduced a new architectural concept, the Replicated Data Queue Manager (RDQM).  This feature is currently based upon Linux Volume Groups and so is only available on the Linux Platform. RDQM provides a highly available configuration similar to MIQM or HA Clusters.  RDQM architecture differs from Multi-Instance Queue Managers (MIQM) in several important ways:

    • RDQM Queue Managers replicate data between themselves rather than rely upon a single shared copy of the data as is done in MIQM.
    • RDQM Queue Managers are currently replicated in sets of 3, rather than sets of "n" as was done with MIQM (although "n" was typically 2).  
    • RDQM can also be used for DR scenarios, which MIQM shared storage generally precluded.  

    Are you using RDQM yet?  Playing with it?  Looking at it?  Never heard of it?  Wherever you are along this path, enjoy the journey.  

     

    Regards,

    Glen Brumbaugh



  • 2.  RE: RDQM

    Posted Sun April 22, 2018 05:42 PM

    Is there a document that covers the advantages and disadvantages of using OS HA, MIQM, RDQM, z/OS Shared Queues and MQ Clusters to enable informed design choices to be made for MQ high availability? It should include cost, benefit, technical complexity, support requirements, etc.

    Glenn Baddeley

    Coles Supermarkets Australia Pty Ltd



  • 3.  RE: RDQM

    Posted Sun April 22, 2018 07:07 PM

    Glenn,

    Unless someone from the Lab jumps in and provides a reference, I'm going to say no, there is no such document available.  Or at least, if there is, I've never seen it.  Here's what the Knowledge Center has:  

    MQ Knowledge Center - HA Configurations

     

    Regards,

    Glen Brumbaugh



  • 4.  RE: RDQM

    Posted Mon April 23, 2018 12:36 AM

    Just some comments:

    >> is only available on the Linux Platform

    or to be specific RHEL 7.3 (or 7.4) x86-64

    >> RDQM can also be used for DR scenarios,

    Arrived in 9.0.5 - also includes asynchronous replication

    RDQM is based on MQA-technology and IBM specifies very strict latency requirements not only between clients and QMs, but also between all three RDQM members. The latency requirements are lower on MQAs since IBM has total control over hardware, software and architecture. On RDQMs the latency requirements are much stricter.

     



  • 5.  RE: RDQM

    Posted Thu October 18, 2018 03:19 AM
    ​Hi,

    Is RDQM only supported on RHEL ? or also supported on SLES as well ?

    Apart from support is there any other limitations of running RDQM on SLES since the customer currently has SLES license as part of its infra not RHEL, wanted to know if there are specific capabilities which limit running RDQM only on RHEL and not other Linux Distributions ?

    Thank You

    ------------------------------
    Murtuza Matiwala
    ------------------------------

    Original Message


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