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Little clarification, the filsystemn its not always slow. It happens
that became very slow with particular users jobs in the farm. Maybe
its just an indication thant we have huge ammount of metadata
requestes, that's why i want to be able to monitor them<br>
<br>
<div class="moz-cite-prefix">On 04/09/14 11:05,
<a class="moz-txt-link-abbreviated" href="mailto:service@metamodul.com">service@metamodul.com</a> wrote:<br>
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<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
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<div> <span>> , any "ls" could take ages.</span> </div>
<div> </div>
<div> <span>Check if you large directories either with many files
or simply large.</span></div>
</blockquote>
<br>
it happens that the files are very large ( over 100G), but there
usually ther are no many files.<br>
<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
type="cite">
<div> </div>
<div> <span>Verify if you have NFS exported GPFS.</span></div>
</blockquote>
<br>
No NFS<br>
<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
type="cite">
<div> </div>
<div> <span>Verify that your cache settings on the clients are
large enough ( maxStatCache , maxFilesToCache , sharedMemLimit
)</span></div>
</blockquote>
will look at them, but i'm not sure that the best number will be on
the client. Obviously i cannot use all the memory of the client
because those blients are meant to run jobs....<br>
<br>
<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
type="cite">
<div> </div>
<div> <span>Verify that you have dedicated metadata luns (
metadataOnly )</span></div>
</blockquote>
Yes, we have dedicate vdisks for metadata, but they are in the same
declustered arrays/recoverygroups, so they whare the same spindles<br>
<br>
<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
type="cite">
<div> </div>
<div> </div>
<div> <span>Reference:</span> </div>
<div> <span><a class="moz-txt-link-freetext" href="https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General%20Parallel%20File%20System%20%28GPFS%29/page/Tuning%20Parameters">https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General%20Parallel%20File%20System%20%28GPFS%29/page/Tuning%20Parameters</a></span>
</div>
<div> </div>
<div> <span>Note:</span> </div>
<div> <span>If possible monitor your metadata luns on the storage
directly.</span></div>
</blockquote>
<br>
that’s exactly than I'm trying to do !!!! :-D<br>
<blockquote
cite="mid:1117005717.712028.1409825118676.open-xchange@oxbaltgw13.schlund.de"
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<div> </div>
<div> </div>
<div> <span>hth</span> </div>
<div> <span>Hajo</span> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<br>
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