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Thanks!<br>
<br>
Is it planned to introduce some metric propagation to the user?<br>
For advanced users who are benchmarking stuff on remote systems it
remains unclear which performance to expect if they can not access
underlaying hardware metrics.<br>
Sure, they can ask the admin to share the config, but it might be
more convenient to be able to look it up, maybe.<br>
<br>
Additionally: if I try to find out the stripe location (lfs
gestripe) and map this information to OST-specs (lctl get_param
osc.*.*ost_conn_uuid), to find out how many different servers and
networks are involved, the obdidx seems to be in dec-format, but the
OST index in connections list is hex, which is not always obvious.<br>
Is there a way to display it both in dec or both in hex?<br>
<br>
Are there generally any tools for doing similar things?<br>
We plan a student project for building kind of GUI for visualizing
stripings and mappings, so I would try to avoid reinventing the
wheel.<br>
<br>
Thank you.<br>
<br>
Best regards<br>
Anna<br>
<br>
<div class="moz-cite-prefix">Am 21.01.2023 um 17:08 schrieb Andreas
Dilger:<br>
</div>
<blockquote type="cite"
cite="mid:2B2973D8-CDF1-4643-9147-012C93A18EF4@whamcloud.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
Hi Anna,
<div>Beyond the number and size of OSTs and MDTs there isn't much
information about the underlying storage available on the
client. </div>
<div><br>
</div>
<div>The "lfs df -v" command will print a "f" at the end for flash
(non-rotational) devices, if the storage is properly configured.
The "osc*.imports " parameter file will contain some
information about the grant_block_size that can be used to
distinguish ldiskfs (4096) vs. zfs backends (131072 or
1048576). </div>
<div><br>
</div>
<div>The size of the disks can often be inferred from 1/8 of the
total OST size for standard 8+2 RAID configs, but this may vary
and no actual device-level metrics are available on the client.
</div>
<div><br>
</div>
<div>Even on the server, Lustre itself doesn't know or care much
about the underlying storage devices beyond (non-)rotational
state, so we don't track any of that. <br>
<br>
<div dir="ltr">Cheers, Andreas</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jan 21, 2023, at 01:16, Anna Fuchs
via lustre-discuss <a class="moz-txt-link-rfc2396E" href="mailto:lustre-discuss@lists.lustre.org"><lustre-discuss@lists.lustre.org></a>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr"> Hi, <br>
<br>
is it possible for a user (no root, so ssh to server) to
find out the configuration of an OST?<br>
How many devices are there in one OST 'pool' (for both
ldiskfs and ZFS) and even which type of devices they are
(nvme, ssd, hdd)? Maybe even speeds and raid-levels?<br>
<br>
Additionally, how can a user find out the mapping of all
available OSTs to OSSs easily?<br>
<br>
Thanks<font size="4"><font face="monospace"><br>
</font></font>Anna<font size="4"><font face="monospace"><br>
</font></font>
<pre class="moz-signature" cols="72">--
Anna Fuchs
Universität Hamburg
<a class="moz-txt-link-freetext" href="https://wr.informatik.uni-hamburg.de" moz-do-not-send="true">https://wr.informatik.uni-hamburg.de</a>
<a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:anna.fuchs@informatik.uni-hamburg.de" moz-do-not-send="true">anna.fuchs@informatik.uni-hamburg.de</a>
<a class="moz-txt-link-freetext" href="https://wr.informatik.uni-hamburg.de/people/anna_fuchs" moz-do-not-send="true">https://wr.informatik.uni-hamburg.de/people/anna_fuchs</a></pre>
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<br>
<pre class="moz-signature" cols="72">--
Anna Fuchs
Universität Hamburg
<a class="moz-txt-link-freetext" href="https://wr.informatik.uni-hamburg.de">https://wr.informatik.uni-hamburg.de</a>
<a class="moz-txt-link-abbreviated" href="mailto:anna.fuchs@informatik.uni-hamburg.de">anna.fuchs@informatik.uni-hamburg.de</a>
<a class="moz-txt-link-freetext" href="https://wr.informatik.uni-hamburg.de/people/anna_fuchs">https://wr.informatik.uni-hamburg.de/people/anna_fuchs</a></pre>
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