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| MB HA issue |
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| leo.yue |
 Posted: Mon Oct 24, 2005 7:27 pm Post subject: MB HA issue |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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All,
I have two AIX boxes running MB5, and I have set up more than one broker instance on each box. According to MB supportpac (ic61), I have to create different db2 instance for every broker instance on one AIX box. Is it feasibility?
| Quote: |
The smallest unit of failover of an MQSI message broker is the broker service together with the
MQSeries queue manager upon which it depends and the broker database, if run locally. The
optimal configuration of brokers and groups is to place each broker in a separate group, with the
resources upon which it depends. Additional brokers should be configured to use separate
database instances and be placed in separate groups.
If the broker database is run locally then the
broker group also needs to contain the database instance and its shared disks.
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BTW,
There are two AIX boxs which are running Message Broker. I should build one broker instance or multi broker instances ? How to choose? thanks a lot! |
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| ashoon |
| Posted: Mon Oct 24, 2005 7:37 pm Post subject: options |
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Master
Joined: 26 Oct 2004
Posts: 235
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Since the MB uses the DB to read flow information on startup I'd think that a seperate DB instance with databases for each broker would be easiest... I usually suggest that you use your current database store for the broker db. instead of running one locally on the broker machines (wonder what others do).
As for one broker or two (one per machine) - the two costs more but it gives you that 'always on' brokering... where if the first machine goes while it fails over the 2nd machine continues processing if you're using MQ clustering and have queue managers on producing/consuming applications.
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| hopsala |
| Posted: Tue Oct 25, 2005 4:32 am Post subject: Re: MB HA issue |
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Guardian
Joined: 24 Sep 2004
Posts: 960
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| leo.yue wrote: |
| I have to create different db2 instance for every broker instance on one AIX box. |
see http://publib.boulder.ibm.com/infocenter/wbihelp/index.jsp?topic=/com.ibm.etools.mft.doc/ah14430_.htm
| leo.yue wrote: |
| There are two AIX boxs which are running Message Broker. I should build one broker instance or multi broker instances ? How to choose? thanks a lot! |
Although this somewhat depends on your specific environment and requirement, I think I can safely state that you do not need more than one instance per machine - it yields no benefits. Tweaking flow instances, execution groups and WMQ should give you all the performance boost you need.
If, however, you're using the same machine for development and production, than you should probably use two brokers - one dev one prod - to keep things nice and seperate. |
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| hopsala |
| Posted: Tue Oct 25, 2005 4:35 am Post subject: Re: options |
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Guardian
Joined: 24 Sep 2004
Posts: 960
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| ashoon wrote: |
| I usually suggest that you use your current database store for the broker db. instead of running one locally on the broker machines (wonder what others do). |
I usually use a local DB, for performance and stability reasons, but it all depends on the site technological structure - if there's a very good DB maintenance team, and they actively manage central store used by the entire organization, then I would indeed prefer to use it despite the performance cost, knowing that I gain better stability (backup etc) in return. |
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| leo.yue |
| Posted: Tue Oct 25, 2005 5:32 pm Post subject: |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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Many thanks.
to hopsala,
If we use MQ cluster to balance broker handling, do you still think a machine should build one broker instance? |
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