<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
Hi All,
<div class=""><br class="">
</div>
<div class="">According to the man page for mmaddcallback:</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">A local</div>
<div class=""> event triggers a callback only on the node on which the</div>
<div class=""> event occurred, such as mounting a file system on one of</div>
<div class=""> the nodes.</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">We have two GPFS clusters here (well, three if you count our small test cluster). Cluster one has 8 NSD servers and one client, which is used only for tape backup … i.e. no one logs on to any of the nodes in the cluster. Files on it are accessed
one of three ways: 1) CNFS mount to local computer, 2) SAMBA mount to local computer, 3) GPFS multi-cluster remote mount to cluster two. On cluster one there is a user callback for softQuotaExceeded that e-mails the user … and that we know works.</div>
</div>
<div class=""><br class="">
</div>
<div class="">Cluster two has two local GPFS filesystems and over 600 clients natively mounting those filesystems (it’s our HPC cluster). I’m trying to implement a similar callback for softQuotaExceeded events on cluster two as well. I’ve tested the callback
by manually running the (Python) script and passing it in the parameters I want and it works - I get the e-mail. Then I added it via mmcallback, but only on the GPFS servers.</div>
<div class=""><br class="">
</div>
<div class="">I did that because I thought that since callbacks work on cluster one with no local access to the GPFS servers that “local” must mean “when an NSD server does a write that puts the user over quota”. However, on cluster two the callback is not
being triggered. Does this mean that I actually need to install the callback on every node in cluster two? If so, then how / why are callbacks working on cluster one?</div>
<div class=""><br class="">
</div>
<div class="">Thanks…</div>
<div class=""><br class="">
</div>
<div class="">Kevin</div>
<br class="">
<div class="">
<div class="">—</div>
<div class="">Kevin Buterbaugh - Senior System Administrator</div>
<div class="">Vanderbilt University - Advanced Computing Center for Research and Education</div>
<div class=""><a href="mailto:Kevin.Buterbaugh@vanderbilt.edu" class="">Kevin.Buterbaugh@vanderbilt.edu</a> - (615)875-9633</div>
<div class=""><br class="">
</div>
<br class="Apple-interchange-newline">
</div>
<br class="">
</body>
</html>