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| rahuldhanpal |
 Posted: Wed Oct 13, 2010 10:53 am Post subject: WMB7 and WMQ7 failover |
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Voyager
Joined: 24 Jan 2009
Posts: 84
Location: Kenosha WI
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hi Guys,
Trying to check if anybody have tried MB7 and MQ7 failover scenarios.
my OS: RHEL 5.4 64-bit
WMQ v7001
WMB v7001
my test: I am trying to failover multi-instance broker and multi-instance Q manager by crashing the broker process(killing bipservice) and see if the broker and q manager failover to the passive node.
Result: i am unable to get this done.
I am running Broker as mq service which is introduced in WMB V7001 and this is to be done while creating the broker for the first time.
As broker is running as mq service even though broker crashes it is not failing over to the passive node.
I am trying to check if i am missing something here. Any thoughts highly appreciated.
Thanks
Rahul. |
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| mqjeff |
| Posted: Wed Oct 13, 2010 12:27 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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I think if you review the documentation, you will not find a place that says that an MI broker will fail the queue manager if it fails.
Also, how much of Broker is required to fail before the whole broker is thought to be dead? |
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| rahuldhanpal |
| Posted: Wed Oct 13, 2010 12:58 pm Post subject: |
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Voyager
Joined: 24 Jan 2009
Posts: 84
Location: Kenosha WI
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Thanks for the response jeff.
yes i agree with you .. that is what i am trying to figure out if the test works.
from the tests i have performed what i observed is the failover of broker happens only if something happens to Q manager(which i think is weird).
And the tests i have performed are
1. Simulating queue manager crash, broker running
2. Simulating broker crash, queue manager running
3. Simulating broker and queue manager crash
4. Simulating node crash
5. Graceful switchover (endmqm -s)
The only test which i am not able to perform successfully is Test #2.
Not Sure if the products supports this  may be i have to revisit the HA stuff ic91/mc91 supportpacs to achieve this.
Thanks
Rahul. |
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| mqjeff |
| Posted: Wed Oct 13, 2010 4:03 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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I'm not disagreeing with you that it at least seems weird.
I'm just suggesting that, since it's not documented to work the way you expect...
That it simply doesn't work the way you expect.
I don't have further information. |
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| Amitha |
| Posted: Thu Oct 14, 2010 2:57 am Post subject: |
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Voyager
Joined: 20 Nov 2009
Posts: 80
Location: Newyork
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Hi rahuldhanpal,
AFAIK, failure over happens only if QM process goes down. so, in your case test 2 is working as it is supposed to. Multi Instance Broker will not fail over until QM fails over. |
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| Amitha |
| Posted: Thu Oct 14, 2010 3:01 am Post subject: |
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Voyager
Joined: 20 Nov 2009
Posts: 80
Location: Newyork
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Here is the quote from Mutli instance broker configuration documentation:
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Use the following guidance about how failover occurs for a multi-instance message broker:
An active broker instance fails over when its associated active multi-instance queue manager terminates unexpectedly, or stops in a controlled manner. The action of stopping an active broker instance on an active multi-instance queue manager does not by itself cause a standby broker instance to become active |
http://www-01.ibm.com/support/docview.wss?uid=swg27017319 |
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| rahuldhanpal |
| Posted: Thu Oct 14, 2010 5:30 am Post subject: |
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Voyager
Joined: 24 Jan 2009
Posts: 84
Location: Kenosha WI
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| Thank you guys for the responses |
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