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| jasonlck |
 Posted: Mon May 18, 2009 11:38 pm Post subject: Pushing Broker to HACMP cluster |
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Apprentice
Joined: 06 Oct 2008
Posts: 48
Location: Singapore
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Hi,
Presume I have 2 AIX servers. Supposedly both need to be on HACMP cluster, however due to lack of expertise and time, one of the servers was installed with DB2, MQ6.0 and MB 6.0. And have been running live since.
Now there is a real need to cluster them. My question is do I destroy the current setup in the single server or do I just run the HA scripts which may/may not push the setup to cluster?
I'm asking to gauge the effort required as production server have limited downtime. |
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| Vitor |
| Posted: Mon May 18, 2009 11:55 pm Post subject: Re: Pushing Broker to HACMP cluster |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| jasonlck wrote: |
| My question is do I destroy the current setup in the single server or do I just run the HA scripts which may/may not push the setup to cluster? |
IMHO there's no need to destroy the current setup, but if the single server is not using the shared storage (controlled by HACMP) then I don't believe the standard scripts will "push" the setup anywhere. You'll need to do a spot of editing (using the supplied scripts as a start point) to achieve what you need.
I'd describe it as "intricate" rather than "difficult". You'd be well advised to knock up a test environment and give the scripts a workout before trying it in a production environment with limited maintenance windows! 
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| jasonlck |
| Posted: Tue May 19, 2009 12:03 am Post subject: Re: Pushing Broker to HACMP cluster |
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Apprentice
Joined: 06 Oct 2008
Posts: 48
Location: Singapore
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Thanks for your reply.
| Vitor wrote: |
IMHO there's no need to destroy the current setup, but if the single server is not using the shared storage (controlled by HACMP) then I don't believe the standard scripts will "push" the setup anywhere. You'll need to do a spot of editing (using the supplied scripts as a start point) to achieve what you need.
I'd describe it as "intricate" rather than "difficult". You'd be well advised to knock up a test environment and give the scripts a workout before trying it in a production environment with limited maintenance windows! |
The single server definitely does not follow HACMP shared storage as there were no setup done for HACMP. Are you saying I need to manipulate the scripts individually to cater for such issues? Wow its alot of work man...
The current environment also includes message flows being deployed and database instance created. Now how do I cater for this as well? |
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| Vitor |
| Posted: Tue May 19, 2009 12:33 am Post subject: Re: Pushing Broker to HACMP cluster |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| jasonlck wrote: |
| Are you saying I need to manipulate the scripts individually to cater for such issues? Wow its alot of work man... |
In the words of a wise man now gone from us - Don't Panic 
IMHO (and this is clearly very general) it's more edit than manipulate. Look through the scripts, see what they're doing, review how appropriate they are and what other steps / activities might be needed.
| jasonlck wrote: |
| The current environment also includes message flows being deployed and database instance created. Now how do I cater for this as well? |
In theory, if the migration to cluster is done correctly this should all sort itself out without further effort.
Don't forget - you still have the option to throw your hands up in horror, destroy the current setup and start again. This is advice & opinion I'm offering, not holy writ... 
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| marko.pitkanen |
| Posted: Tue May 19, 2009 12:37 am Post subject: |
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Chevalier
Joined: 23 Jul 2008
Posts: 440
Location: Jamsa, Finland
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Hi,
You have 2 separate part here:
- first part is broker's and user databases (broker connects to them through ODBC connections) and
- the second part is the broker and it's qmanager (and perhaps ConfigMgr)
First examine how HACMP can be enabled for databases.
Then examine what is basically needed to enable HACMP for broker and qmanager (support packs mc91 and ic91 contains good starting point pdfs for you).
But what I strongly recommend for you is that you contact to your IBM contact and get official support from there, and involve them to the project.
Marko |
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| jasonlck |
| Posted: Tue May 19, 2009 1:35 am Post subject: |
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Apprentice
Joined: 06 Oct 2008
Posts: 48
Location: Singapore
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| Alright i'll keep note of it... thanks for your replies |
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| PeterPotkay |
| Posted: Tue May 19, 2009 11:55 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| marko.pitkanen wrote: |
| But what I strongly recommend for you is that you contact to your IBM contact and get official support from there, and involve them to the project. |
IC91 and MC91 are both Cat 2 Support Packs, so I would be surprised if they DID help you. They have no obligation.
In my opinion, its crazy that MC91 and IC91 are not Cat 3 Support Packs.
If this was my set up, I would create a new DB@ Instance, QM and Broker, HACMP'em, and then when convinient, flip the traffic from the old non clustered Broker to the new one. Its not impossible to convert the old, but I'd prefer to start with a brand new Broker that was built correctly from the begining. Otherwise every problem going forward might have you asking "Is this because of that rebirth we forced on our Broker when we converted it? Did we miss a step?"
_________________
Peter Potkay
Keep Calm and MQ On |
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| jasonlck |
| Posted: Tue May 19, 2009 4:57 pm Post subject: |
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Apprentice
Joined: 06 Oct 2008
Posts: 48
Location: Singapore
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Hi Peter,
| PeterPotkay wrote: |
| IC91 and MC91 are both Cat 2 Support Packs, so I would be surprised if they DID help you. They have no obligation. |
As a matter of fact, I had actually raised some PMRs for HACMP related issues with Message Broker before. And they were quite helpful to isolate the problem. However the problem was resolved by myself before they could give me a solution. Well at least they were "a friend in need" haha...
| PeterPotkay wrote: |
| In my opinion, its crazy that MC91 and IC91 are not Cat 3 Support Packs. |
Yes I've read on your rant about this. And during the PMR i was concerned so I asked IBM whether how much they can help. They didn't say much but they say they'll do their best. I guess its a case by case scenario. |
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