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| Hacmp Configuration , which is better? |
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| Monk |
 Posted: Mon Jul 27, 2009 3:06 am Post subject: Hacmp Configuration , which is better? |
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Master
Joined: 21 Apr 2007
Posts: 282
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Hi All,
I have a MQ Clustered environment.
I m moving to a HACMP enviroment.
I have a question regarding the MQ clients.
In a HACMP Standby environment(Active-Passive) , during normal operation.
My MQ client is connected to the Active machine' Qmgr , suddenly the Qmgr goes down, Now there will be a switch over and this will take some time , say 3 mins..
Now during this time what will happen to my MQ client, Will i get a 2009 connection broken error ?
if i do get a connection broken error, What other options i have to make sure the connection is up all the time , irrespective of Qmgr failure.
Should i use a Active-Active or a takeover configuration? or should i make my MQ clients handle the connection broken errors.
and If i should make my MQ clients handle connection broken errors.Whats the best way to do it? arrg this also means change to a lot of code.
Pls help.
Thanks.
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Thimk |
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| Vitor |
| Posted: Mon Jul 27, 2009 4:42 am Post subject: Re: Hacmp Configuration , which is better? |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Monk wrote: |
| My MQ client is connected to the Active machine' Qmgr , suddenly the Qmgr goes down, Now there will be a switch over and this will take some time , say 3 mins.. |
I'd hope it would be faster than that on an active/passive, but this doesn't affect your question...
| Monk wrote: |
| Now during this time what will happen to my MQ client, Will i get a 2009 connection broken error ? |
Yes.
| Monk wrote: |
| if i do get a connection broken error, What other options i have to make sure the connection is up all the time , irrespective of Qmgr failure. |
If the queue manager goes down, the connection breaks. It's as simple as that.
| Monk wrote: |
| Should i use a Active-Active or a takeover configuration? or should i make my MQ clients handle the connection broken errors. |
Your clients should always recover from connection broken errors. Even if the queue manager is not clustered/under HACMP, there's a number of scenarios in which the connection would break. Remember that a client connection is to a given queue manager, not to a cluster or an HACMP node.
| Monk wrote: |
| and If i should make my MQ clients handle connection broken errors.Whats the best way to do it? |
One popular solution (though not the only one) is to catch 2009/2019 errors and reconnect n times before rethrowing as a fatal error.
| Monk wrote: |
| arrg this also means change to a lot of code. |
This sort of code should be in client code from day one.
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| Monk |
| Posted: Mon Jul 27, 2009 7:53 pm Post subject: |
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Master
Joined: 21 Apr 2007
Posts: 282
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thanx Poobah.
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Thimk |
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