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| H.A for WMB on UNIX |
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| PeterPotkay |
 Posted: Wed Jul 23, 2008 9:44 am Post subject: H.A for WMB on UNIX |
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Poobah
Joined: 15 May 2001
Posts: 7722
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My environment, although the questions / comments apply to various platforms:
MQ 6.0.2.4
WMB 6.1.0.2
Veritas Cluster Services
RHEL 4
x86-64 bit
I can't believe that MC91 and IC91 are still Category 2 support packs. IBM made hardware clustering part of the base MQ product for Windows way back in 5.3. MQ 7.0 and WMB 6.1 still doesn't "officially" recognize that we need to hardware cluster MQ and WMB on Unix?!
What is the relationship between the MQM Agent for Veritas in MC91 versus the vendor supplied Veritas H.A. Agent for WebSphere MQ? Both have similar methods / executables - Online, Offline, Monitor and Clean. The Veritas documentation even says these methods use "IBM provided scripts".
Has anyone compared the two? Which one to use?
It doesn't appear that VCS has a WMB Agent. So can one use the VCS MQ Agent instead of MC91, and still use IC91 for the Broker?
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Peter Potkay
Keep Calm and MQ On |
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| sridhsri |
| Posted: Wed Jul 23, 2008 10:08 am Post subject: |
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Master
Joined: 19 Jun 2008
Posts: 297
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I found this official statement on support for HA
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Official Support Statement
Support for WebSphere MQ in a High Availability environment on Unix.
This note is to clarify what is and what is not supported when WMQ is being used in a High Availability (HA) configuration on Unix. These are situations where products such as HACMP, Veritas and ServiceGuard are used to control "failover" between an active and standby machine. This information holds for both the full WMQ product, and for the embedded version in WebSphere Application Server V5.
We DO NOT support the code that is needed for configuring, monitoring and starting/stopping queue managers in HA clusters. Scripts that assist with this capability are available as unsupported Category 2 SupportPacs (MC63, MC69, MC6A, MC69 and MC91) or might have been written independently by the customer. Customers who need assistance with configuring or managing Unix HA clusters should not be using MQ PMRs.
We DO support:
1. Queue managers which happen to be running in an HA cluster. There is no difference between a queue manager executing in a cluster and any other configuration. PMRs must not be rejected simply because HA is mentioned, whether or not the customer is using one of the SupportPacs. Standard problem determination procedures can be followed to work out whether there really is a problem in the queue manager.
2. Queue managers running under Microsoft Cluster Server (MSCS) on Windows. This has been supported since WMQ 5.3. |
In particular
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| There is no difference between a queue manager executing in a cluster and any other configuration. |
Perhaps, that explains why the above mentioned support packs are cat 2. |
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| PeterPotkay |
| Posted: Wed Jul 23, 2008 10:46 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| Quote: |
We DO support:
2. Queue managers running under Microsoft Cluster Server (MSCS) on Windows. This has been supported since WMQ 5.3.
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So why not Unix?
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In particular
Quote:
There is no difference between a queue manager executing in a cluster and any other configuration.
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Except everything you have to do to get it to work in a cluster.
Anyway, the answer to why they don't provide Cat 3 Support for IC / MC 91 or build it into the base product is "just because" for now. It was a rant and a question I didn't expect to really be answered.
What I'm really looking for is if anyone knows the pros and cons between MC91 and VCS's MQ agent.
And can IC91 be used with the VCS MQ Agent (no MC91).
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Peter Potkay
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| mqjeff |
| Posted: Wed Jul 23, 2008 11:06 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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I'd suspect the main reason that Unix support for HA is not supplied with the product is that there are *so many* different ones, at least one for each Unix.... RedHat has their own version, Veritas, Sun, HACMP, etc. etc. etc...
It would be a healthy task to manage vendor specific versions for each platform. And then people would complain that they wanted to use Veritas on their RH systems instead of the RH standard... and have to go get IC91 to do that, and then complain that it's not supplied with the product. Granted, unix people do not complain about these things as much as Windows people do.
You can pick&choose pieces of at least MC91 - to use the Veritas start/stop scripts with the AIX ha scripts, for example... so I assume you can do the same with IC91. But that's what test environments is for, anyway. |
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