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thank you all,<br>
just tryed set performance.nl-cache on and worked out<br>
<br>
<br>
<div class="moz-cite-prefix">Il 11/04/2021 10.29, Amar Tumballi ha
scritto:<br>
</div>
<blockquote type="cite"
cite="mid:CAKknVp3aiNn9Tsp40xL2MefubwQOORgNVKVjp_bFyG8DgUvWBw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">Hi Marco, this is really good test/info. Thanks.
<div dir="auto"><br>
</div>
<div dir="auto">One more thing to observe is you are running
such tests is 'gluster profile info', so the bottleneck fop is
listed.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Mohit, Xavi, in this parallel operations, the
load may be high due to inodelk used in mds xattr update in
dht? Or you guys suspect something else?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Regards</div>
<div dir="auto">Amar</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 10 Apr, 2021, 11:45 pm
Marco Lerda - FOREACH S.R.L., <<a
href="mailto:marco.lerda@foreach.it" moz-do-not-send="true">marco.lerda@foreach.it</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">hi,<br>
we have isolated the problem (meanwhile some hardware upgrade
and code <br>
optimization helped to limit the problem).<br>
it happens when many request (HTTP over apache) comes to a non
existent <br>
file.<br>
With 30 concurrent request to the same non existing file cause
the load <br>
go high without limit.<br>
Same requests on existing files works fine.<br>
I have tried to simulate che apache access to file excluding
apache with <br>
repeated command on files with the same parallelism (30):<br>
- with ls works fine, file exists or not<br>
- with stat works fine, file exists or not<br>
- with xattr load go up, file exists or not<br>
<br>
thank you<br>
<br>
<br>
Il 05/10/2020 19.45, Marco Lerda - FOREACH S.R.L. ha scritto:<br>
> hi,<br>
> we use glusterfs on a php application that have many
small php files <br>
> images etc...<br>
> We use glusterfs in replication mode.<br>
> We have 2 nodes connected in fiber with 100MBps and less
than 1 ms <br>
> latency.<br>
> We have also an arbiter on slower network (but the issue
is there also <br>
> without the arbiter).<br>
> When we copy a directory (cp command) with many files,
cpu usage and <br>
> load explode raplidly,<br>
> our application become inaccessible until the copy ends.<br>
><br>
> I wonder if is that normal or we have done something
wrong.<br>
> I know that glusterfs is not indicated with many small
files, and I <br>
> know that it slow down,<br>
> but I want to avoid that a simple copy of a directory
will put down <br>
> out application.<br>
><br>
> Any suggestion?<br>
><br>
> Thanks a lot<br>
><br>
><br>
><br>
> ________<br>
><br>
><br>
><br>
> Community Meeting Calendar:<br>
><br>
> Schedule -<br>
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><br>
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<br>
-- <br>
<br>
------------------------------------------------------<br>
Marco Lerda<br>
FOREACH S.R.L.<br>
Via Laghi di Avigliana 115, 12022 - Busca (CN)<br>
Telefono: 0171-1984102<br>
Centralino/Fax: 0171-1984100<br>
Email: <a href="mailto:marco.lerda@foreach.it"
target="_blank" rel="noreferrer" moz-do-not-send="true">marco.lerda@foreach.it</a><br>
Web: <a href="http://www.foreach.it" rel="noreferrer
noreferrer" target="_blank" moz-do-not-send="true">http://www.foreach.it</a><br>
<br>
________<br>
<br>
<br>
<br>
Community Meeting Calendar:<br>
<br>
Schedule -<br>
Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC<br>
Bridge: <a href="https://meet.google.com/cpu-eiue-hvk"
rel="noreferrer noreferrer" target="_blank"
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Gluster-users mailing list<br>
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rel="noreferrer" moz-do-not-send="true">Gluster-users@gluster.org</a><br>
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href="https://lists.gluster.org/mailman/listinfo/gluster-users"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true">https://lists.gluster.org/mailman/listinfo/gluster-users</a><br>
</blockquote>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
------------------------------------------------------
Marco Lerda
FOREACH S.R.L.
Via Laghi di Avigliana 115, 12022 - Busca (CN)
Telefono: 0171-1984102
Centralino/Fax: 0171-1984100
Email: <a class="moz-txt-link-abbreviated" href="mailto:marco.lerda@foreach.it">marco.lerda@foreach.it</a>
Web: <a class="moz-txt-link-freetext" href="http://www.foreach.it">http://www.foreach.it</a></pre>
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