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<p>Hello,</p>
<p>I have been thinking about setting up a CES cluster on my GPFS
custer for easier data distribution. The cluster is quite an old
one - since 3.4, but we have been doing rolling upgrades on it.
4.2.0 now, ~200 nodes Centos 7, Infiniband interconnected.<br>
</p>
The problem is this little line in Spectrum Scale documentation:<br>
<br>
<blockquote type="cite">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<span style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: medium; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; display: inline !important;
float: none;">The CES shared root directory cannot be changed
when the cluster is up and running. If you want to modify the
shared root configuration, you must bring the entire cluster
down.</span></blockquote>
<br>
Does this mean that even the first time I'm setting CES up, I have
to pull down the whole cluster? I would understand this level of
service disruption when I already had set the directory before and
now I was changing it, but on an initial setup it's quite an
inconvenience. Maybe there's a less painful way for this?<br>
<br>
Best regards,<br>
<pre class="moz-signature" cols="72">--
Sander Kuusemets
University of Tartu, High Performance Computing
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