<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style id="owaParaStyle" type="text/css">P {margin-top:0;margin-bottom:0;}</style>
</head>
<body ocsi="0" fpstyle="1" style="">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Another known issue with slow "ls" can be the annoyance that is 'sssd' under newer OSs (rhel 6) and properly configuring this for remote auth. I know on my nsd's I never did and
the first ls in a directory where the cache is expired takes forever to make all the remote LDAP calls to get the UID info. bleh.<br>
<br>
Ed<br>
<br>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div style="direction: ltr;" id="divRpF310662"><font color="#000000" face="Tahoma" size="2"><b>From:</b> gpfsug-discuss-bounces@gpfsug.org [gpfsug-discuss-bounces@gpfsug.org] on behalf of service@metamodul.com [service@metamodul.com]<br>
<b>Sent:</b> Thursday, September 04, 2014 6:05 AM<br>
<b>To:</b> gpfsug main discussion list<br>
<b>Subject:</b> Re: [gpfsug-discuss] gpfs performance monitoring<br>
</font><br>
</div>
<div></div>
<div>
<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>
<div><span>Verify if you have NFS exported GPFS.</span> </div>
<div><span>Verify that your cache settings on the clients are large enough ( maxStatCache , maxFilesToCache , sharedMemLimit )</span>
</div>
<div><span>Verify that you have dedicated metadata luns ( metadataOnly )</span> </div>
<div> </div>
<div><span>Reference:</span> </div>
<div><span>https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General%20Parallel%20File%20System%20%28GPFS%29/page/Tuning%20Parameters</span>
</div>
<div> </div>
<div><span>Note:</span> </div>
<div><span>If possible monitor your metadata luns on the storage directly.</span>
</div>
<div> </div>
<div><span>hth</span> </div>
<div><span>Hajo</span> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
</div>
</div>
</div>
</body>
</html>