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MQSeries.net Forum Index » General IBM MQ Support » QMGR Data and Logs on Separate Disks

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vsathyan
PostPosted: Thu Jul 23, 2015 4:08 am    Post subject: QMGR Data and Logs on Separate Disks Reply with quote

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Joined: 10 Mar 2014
Posts: 121
This IBM Link
http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.ins.doc/q008510_.htm

says that hosting queue manager data and logs on separate disks increases the performance.

My question is - is this applicable for Multi-Instance queue managers also? Since we may need 2 NFS4 mounts to put data and logs, and when we failover the queue manager from active to standby - how are the file locks handled as they are in different mounts?

Thanks
vsathyan
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fjb_saper
PostPosted: Thu Jul 23, 2015 4:40 am    Post subject: Re: QMGR Data and Logs on Separate Disks Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
vsathyan wrote:
This IBM Link
http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.ins.doc/q008510_.htm

says that hosting queue manager data and logs on separate disks increases the performance.

My question is - is this applicable for Multi-Instance queue managers also? Since we may need 2 NFS4 mounts to put data and logs, and when we failover the queue manager from active to standby - how are the file locks handled as they are in different mounts?

Thanks
vsathyan

Typically on a Multi-Instance queue manager you should have different mounts for data and logs to the SAN making sure they do not overlap on the physical disk.
So if the files system served by one mount should go bad (god forbid) the second mount is still good....
Now if you have multiple SAN's ...
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smdavies99
PostPosted: Thu Jul 23, 2015 5:24 am    Post subject: Re: QMGR Data and Logs on Separate Disks Reply with quote

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Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
fjb_saper wrote:

Now if you have multiple SAN's ...


What!!!!! Are you saying that you only have one SAN? One single point of failure?

Some systems I've worked on have multiple SANS setup so that one takes over from the other in the event of failure. Naturally these are in different DC's with lots of fat fibre connecting them.

It all comes down to $$$$$ really.
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Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions.
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