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| /var/mqm and var/mqm/log local FS on Solaris |
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| tczielke |
 Posted: Thu Jul 08, 2010 9:41 am Post subject: /var/mqm and var/mqm/log local FS on Solaris |
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Guardian
Joined: 08 Jul 2010
Posts: 941
Location: Illinois, USA
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The Webspere MQ version 6 and version 7 manuals have the following restriction for installing the server on Solaris:
The /var/mqm and /var/mqm/log directories must be on a local file system.
Is someone aware of any issues with having /var/mqm and /var/mqm/log mounted to NFS? Specifically, is MQ doing any type of file locking to some of the files on these directories that could run into issues if either of those 2 directories are mounted to NFS? |
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| PeterPotkay |
| Posted: Thu Jul 08, 2010 9:43 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| tczielke |
| Posted: Thu Jul 08, 2010 9:53 am Post subject: |
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Guardian
Joined: 08 Jul 2010
Posts: 941
Location: Illinois, USA
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| Thanks Peter for the quick reply! Would you know though any of the specifics of why that restriction was stated? Is it more of a best practice type of thing, or are there potential/known issues you can run into by mounting the /var/mqm and /var/mqm/log directories to NFS? |
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| bruce2359 |
| Posted: Thu Jul 08, 2010 10:10 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| Quote: |
| Would you know though any of the specifics of why that restriction was stated? Is it more of a best practice type of thing, or are there potential/known issues you can run into by mounting the /var/mqm and /var/mqm/log directories to NFS? |
Go a bit further back in the InfoCenter to see what WMQ does with the filesystem, and how it delineates between system and user portions of the filesystem.
Your post is asking "exactly why did IBM do this?" and "can I safely violate this?" I doubt IBM will give you an explicit answer to the former. As to the latter, there are WMQ system portions of the filesysem that WMQ software must maintain absolute ownership without conflict. This is the same as with an o/s, where portions must be where the vendor requires. Doing otherwise will lead to corruption, unpredictable results, or (my favorite) failure.
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| Vitor |
| Posted: Thu Jul 08, 2010 12:00 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| tczielke wrote: |
| Is it more of a best practice type of thing, or are there potential/known issues you can run into by mounting the /var/mqm and /var/mqm/log directories to NFS? |
If the documentation says "don't do it", then it's not best practice but a requirement.
If you violate this and then hit any problems of any kind later, then any attempt to obtain support from IBM is likely to be met with "sorry, you're running an unsupported configuration".
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Honesty is the best policy.
Insanity is the best defence. |
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