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MQSeries.net Forum Index » Clustering » Repointing a PR QM to the clusters "Other" FR

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smeunier
PostPosted: Tue Sep 22, 2015 12:35 pm    Post subject: Repointing a PR QM to the clusters "Other" FR Reply with quote

Partisan

Joined: 19 Aug 2002
Posts: 305
Location: Green Mountains of Vermont

Greetings.......

Environment: AIX 6.1
MQ 7.5.0.3

I have an established cluster with two FR's (i'll call them FR1 and FR2). Soon I will be moving FR1 to another Queue Manager. Most of the PR's in the cluster currently have clussdr channels to FR1. I wanted to get a heads up on this move and have the PR's start using FR2 instead. As a test, I defined another clussdr channel to FR2. Stopped the clssdr channel to FR1. Created a new cluster queue.

I expected or had hoped that it would use the FR2 clussdr channel. What I found, were two message stuck on the SYSTEM.CLUSTER.TRANSMIT.QUEUE with correlation ids of TO.FR1 It seems that the PR is bound to FR1. I started the clssdr channel to FR1 again and the messages flowed. My question is: how do I swap what FR the PR communicates with?

The new FR will have a different name, so it is more than just altering the clussdr conname or a dns alias. I would like to move all the current PR's point to FR1 to FR2, then drop FR1 from the cluster as a FR and then add the new QMGR in as the new second FR.

Just wondering how to do/force that FR path to FR2 at this point, or maybe my process is flawed all together!
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mqjeff
PostPosted: Tue Sep 22, 2015 12:44 pm    Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17447

demote the FR to a PR.
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smeunier
PostPosted: Wed Sep 23, 2015 5:47 am    Post subject: Reply with quote

Partisan

Joined: 19 Aug 2002
Posts: 305
Location: Green Mountains of Vermont

Quote:
demote the FR to a PR


By demoting FR1 to a PR, it would flush the current clussdr in the PR(s) cache and use the "other" manually defined clussdr which now points to FR2. Am I understanding that correctly?

So setting up the new FR and introducing it to the cluster would not be a benefit until I demote the old FR and flush those old FR1 connections away. Correct?
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mqjeff
PostPosted: Wed Sep 23, 2015 5:49 am    Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17447

If you add a new FR, then PRs will discover it.

If you delete an FR qmgr without demoting it, then the cluster will be ... problematic.
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