Topic
IC4NOTICE: developerWorks Community will be offline May 29-30, 2015 while we upgrade to the latest version of IBM Connections. For more information, read our upgrade FAQ.
11 replies Latest Post - ‏2013-02-08T07:31:50Z by SystemAdmin
Erwin_Karbasi
Erwin_Karbasi
186 Posts
ACCEPTED ANSWER

Pinned topic MMR sync notification

‏2012-08-07T12:47:20Z |
Hello Maters,

How can i receive notification when two linked domain services - MMR are synchronized.

We have two sites per region. These two sites (domain services) are linked via MMR method. If site 2 has been failed and restarted, how can i know that the synchronous process among above sites has been finished.

I didn't find any xscmd command or JMX MBean that supply this notification.

Your direction/insight would be highly appreciated.

Thank you in advance,
Erwin
Updated on 2013-02-08T07:31:50Z at 2013-02-08T07:31:50Z by SystemAdmin
  • Erwin_Karbasi
    Erwin_Karbasi
    186 Posts
    ACCEPTED ANSWER

    Re: MMR sync notification

    ‏2012-08-08T05:15:53Z  in response to Erwin_Karbasi
    Any direction please?
    • lisaw
      lisaw
      101 Posts
      ACCEPTED ANSWER

      Re: MMR sync notification

      ‏2012-08-09T20:59:34Z  in response to Erwin_Karbasi
      xscmds that are useful but you will have to manually calculate are:

      xscmd -c showLinkedDomains - to verify a link still remains
      xscmd -c showLinkedPrimaries - to verify which shards are linked.
      xscmd -cep <catalogServersInDomain1> revisions - Filter this list down to focus on the primary shards shown in the showLinkedPrimaries and store the revision numbers.
      xscmd -cep <catalogServersInDomain2> revisions - Filter this list down to focus on the primary shards shown in the showLinkedPrimaries and store the revision numbers.

      We are adding enhanced tooling to show the domain replication state in the near future so that this will become easier to do.

      • Lisa

      Websphere eXtreme Scale Development
      • Erwin_Karbasi
        Erwin_Karbasi
        186 Posts
        ACCEPTED ANSWER

        Re: MMR sync notification

        ‏2012-08-10T07:51:16Z  in response to lisaw
        Thank you a lot.
      • td_w
        td_w
        3 Posts
        ACCEPTED ANSWER

        Re: MMR sync notification

        ‏2012-09-22T05:29:09Z  in response to lisaw
        Hi Lisa,

        We are using the latest version of eXtreme Scale v8.5.0.1. I tried xscmd.sh -c showLinkedDomains.... However, the command is not defined in xscmd. Could you please tell me which version of xscmd is supporting showLinkedDomains?

        Thanks in Advance,
        • lisaw
          lisaw
          101 Posts
          ACCEPTED ANSWER

          Re: MMR sync notification

          ‏2012-09-24T18:13:47Z  in response to td_w
          To see what commands are available for your version, invoke this command to list commands associated with MMR.

          xscmd.sh -lc MultiMasterReplication

          showLinkedDomains will be available in an upcoming release. As said before, we are adding enhanced tooling to show the domain replication state in the near future.

          • Lisa

          Websphere eXtreme Scale Development
          • td_w
            td_w
            3 Posts
            ACCEPTED ANSWER

            Re: MMR sync notification

            ‏2012-09-24T20:14:28Z  in response to lisaw
            Hi Lisa,

            Thank you so much for your response. It is pretty clear that our current xscmd from eXtreme Scale v8.5 does not support this command. Does command:showLinkedDomains need new feature in future eXtreme Scale release to work? Or it can work with eXtreme Scale v8.5. But, this command is just not included in current xscmd?

            Thanks,
            • Erwin_Karbasi
              Erwin_Karbasi
              186 Posts
              ACCEPTED ANSWER

              Re: MMR sync notification

              ‏2012-12-07T00:33:51Z  in response to td_w
              Hello All,

              If I'd like to indicate programmatically the grid MMR status, can I use the ObjectGridMBean:getPrimaryShardLinks:status JMX MBean?

              Thanks,
              Erwin
              • Erwin_Karbasi
                Erwin_Karbasi
                186 Posts
                ACCEPTED ANSWER

                Re: MMR sync notification

                ‏2012-12-11T06:10:44Z  in response to Erwin_Karbasi
                Your assistance would be appreciated.
                • Erwin_Karbasi
                  Erwin_Karbasi
                  186 Posts
                  ACCEPTED ANSWER

                  Re: MMR sync notification

                  ‏2013-01-30T11:02:46Z  in response to Erwin_Karbasi
                  Hello Lisa,

                  According your answer in order indicating MMR links success we need to run following commands:

                  
                  xscmd -c showLinkedDomains - to verify a link still remains xscmd -c showLinkedPrimaries - to verify which shards are linked. xscmd -cep <catalogServersInDomain1> revisions - Filter 
                  
                  this list down to focus on the primary shards shown in the showLinkedPrimaries and store the revision numbers. xscmd -cep <catalogServersInDomain2> revisions - Filter 
                  
                  this list down to focus on the primary shards shown in the showLinkedPrimaries and store the revision numbers.
                  


                  1. We are using XS version 8.5.0.3 but I didn't figure out any showLinkedDomains command.
                  2. From your answer I have understood that I need to compare the two revisions lists from the both domain services in order
                  detecting that both sides primary revisions numbers are equal,
                  this will verify that the MMR link sync was successful.
                  Is it correct?
                  3. Do we need to use the same commands in order verifying successful sync among Zones ?

                  Your directions would be highly appreciated.

                  Thanks in advance,
                  Erwin
  • Erwin_Karbasi
    Erwin_Karbasi
    186 Posts
    ACCEPTED ANSWER

    Re: MMR sync notification

    ‏2013-01-30T11:04:16Z  in response to Erwin_Karbasi
    Your answers would be highly appreciated.