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| Vin |
 Posted: Fri Feb 18, 2005 2:53 pm Post subject: Veritas MQSeries clustering |
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Master
Joined: 25 Mar 2002
Posts: 212
Location: India
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we are planning to have an Veritas MQ cluster, so basically we have two machines on which we installed the mq series servers and a shared disk for the /var/mqm and we are using a publish/subscribe mechanism. My questions are
1) Are the topics that we are publishing and subscribing to persistent in the case of an MQ failover to the second box?
2) If the broker goes down on the first box, is the broker on the second box automatically started? and the messages to all the subscribers delivered?
3) What about the seq num issues and the time for failover - are they something that we should consider?
Please let me know if anyone has the same configuration already installed, I know that the messages would automatically be transferred but what about the topics (since they are logical not physical), appreciate your responses |
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| yeger |
| Posted: Wed Apr 06, 2005 10:46 pm Post subject: mq clustre on veritas |
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Newbie
Joined: 09 Mar 2005
Posts: 8
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well, i have installed an Microsoft cluster using the vertias software
we installed two QMgr's and worked acording toe the IBM guide of how to install this.
our application is not Publish / subscribe but on any failure on one side the whole side of the cluster is performing a failover so that all services are being meneged by the other cluster node.
since all messeges are running in the shared disk (at least according to IBM) no info is lost.
hope it helps. |
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| jefflowrey |
| Posted: Thu Apr 07, 2005 2:01 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Which broker?
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I am *not* the model of the modern major general. |
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| xxx |
| Posted: Fri Apr 08, 2005 8:46 am Post subject: |
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Centurion
Joined: 13 Oct 2003
Posts: 137
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1) Cluster failover is just like stop and start of the Qmanger ,
so persistence should remain the same , i.e you are stoping the Qmanger and restarting it on a clone , So there will be no issue !
2) When you are failing over MQSeries with Pub/Sub will be killed and restarted on the failover server , You should code your startup scripts accordingly ( i.e the scirpts should stop MQ properly on the fialover box and bring them up on the other server)
3) Seq no etc are not a issue , as everything reamins the same |
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| jefflowrey |
| Posted: Fri Apr 08, 2005 8:58 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| xxx wrote: |
| 2) When you are failing over MQSeries with Pub/Sub will be killed and restarted on the failover server , You should code your startup scripts accordingly ( i.e the scirpts should stop MQ properly on the fialover box and bring them up on the other server) |
Again, the failover procedures for a pub/sub broker depend entirely on which pub/sub broker is being used.
_________________
I am *not* the model of the modern major general. |
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| xxx |
| Posted: Fri Apr 08, 2005 9:22 am Post subject: |
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Centurion
Joined: 13 Oct 2003
Posts: 137
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I agree,
But either way if it is MQSI , there will be no use of having MQ failedover and MQSI running on the primary ,
So they should be included in one group and failed over ,
In case of ordinary support pack pub/sub , it is just an MQ Failover , and start and stop scripts will have endmqbrk and strmqbrk accordingly |
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