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| Microsoft Clustering |
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| rammer |
 Posted: Fri Nov 05, 2004 8:58 am Post subject: Microsoft Clustering |
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Partisan
Joined: 02 May 2002
Posts: 359
Location: England
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Hi.
I am trying to find the answer to the following but am struggling to think if I actually know what I am on about so I would appreciate any of your thoughts.
The Scenario is:
Web Server putting messages via clustering destined for Application Servers (2x). These messages go through a Hub(2x) which both run a Service Guard package so if there is a hardware failure 1 Server can run both packages.
It is critical that there is hardware failure on the two micorsoft application servers. I am not sure how I should configure the Micorosft servers for hardware failure.
My question is.
Can the two NT Serversoperate as a network load balanced server so this would be active/active with both servers running MQ. Or can it only run in active/passive mode. There will be direct attached shared storage available between the two servers.
Hope the above is not to confusing.
Regards
Rammer |
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| jefflowrey |
| Posted: Fri Nov 05, 2004 10:22 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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There's quite a bit of good information available about MSCS clustering with MQ in the Help that is installed with MQ.
But, yes, you can configure an Active/Active configuration with MSCS and WebSphere MQ.
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I am *not* the model of the modern major general. |
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| rammer |
| Posted: Mon Nov 08, 2004 2:41 am Post subject: |
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Partisan
Joined: 02 May 2002
Posts: 359
Location: England
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Hi Jeff,
Thanks for the reply, yes your right there is quite a lot of documentation on MSCS. I have read through this and have just have a couple of questions regarding active/active
In this scenario I will have two Microsoft Servers, that at the moment are in a traditional MQ Cluster (not using MSCS) and they both host the Queue APP_QUEUE.
I am looking to rebuild the environment to add hardware failover in, but am just hitting a brick wall in my understanding on how to do this, as i am still wanting 2 qmgrs to be able to process the messages on the two cluster queues APP_QUEUE but to obviously failover if a problem is encountered and for the other one to take over.
Thanks in advance |
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| JasonE |
| Posted: Mon Nov 08, 2004 2:53 am Post subject: |
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Grand Master
Joined: 03 Nov 2003
Posts: 1220
Location: Hursley
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If you really want 2 qmgrs housing the same queue AND hardware failover as well, I think you are talking an active-active setup. Ie 2 qmgrs both house the queue, and run on their own node. Then if one fails, the qmgr can run on the other node (ie for a period of time while the failure is fixed, one node runs both qmgrs). Eventually you fix the failing node, and move the qmgr back so each qmgr is running on its own node (You can configure a preferred node, and failback).
Note with this setup, the 2 qmgrs need to be listening on different tcpip ports, and you cant rely on a default qmgr anywhere. |
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| jefflowrey |
| Posted: Mon Nov 08, 2004 5:39 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Basically, you want a setup like this:
Machine A:
Qmgr A (Normally)
Qmgr B(Only when failed over)
Machine B:
QMgr B(Normally)
QMgr A(Only when failed over).
So in a normal case, Machine A will only have Qmgr A, and Machine B only Qmgr B. If Machine A goes down, QMgrA will failover to Machine B. Likewise if Machine B goes down, Qmgr B will failover to Machine A.
Of course, if they both go down....
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I am *not* the model of the modern major general. |
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| rammer |
| Posted: Mon Nov 08, 2004 5:59 am Post subject: |
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Partisan
Joined: 02 May 2002
Posts: 359
Location: England
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Thanks for the responses's, I will now try and get the project to give me the kit to test it on. 
Cheers
Rammer |
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