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<p><font face="monospace">Hi Jan-Frode</font></p>
<p><font face="monospace">interesting! Is this something I could
apply to the linux clients, too, or is this only for windows
clients?</font></p>
<p><font face="monospace">cheers</font></p>
<p><font face="monospace">leo</font></p>
<pre class="moz-signature" cols="72">Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader Data Analysis and Research Infrastructure
Group Leader Data Curation a.i.
Deputy Department Head Science IT Infrastructure and Services department
Science IT Infrastructure and Services department (AWI)
OBBA/230
Forschungstrasse 111
5232 Villigen PSI
Switzerland
Phone: +41 56 310 3369
<a class="moz-txt-link-abbreviated" href="mailto:leonardo.sala@psi.ch">leonardo.sala@psi.ch</a>
<a class="moz-txt-link-abbreviated" href="http://www.psi.ch">www.psi.ch</a></pre>
<div class="moz-cite-prefix">On 6/1/26 15:24, Jan-Frode Myklebust
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAHwPatinzOUOeXJgPq6e2MKrmq7s1fZ8gcV9srdms2HF6Lk43A@mail.gmail.com">
<pre wrap="" class="moz-quote-pre">Not too long ago there were some reports about SMB signing being very
costly. Signing would give approximately 500 MB/s, while encryption
would give closer to 1200 MB/s. Signing is controlled by Security
Settings -> Local Policies -> Security options "Microsoft network
client: Digitally Sign Communications (always)".
-jf
On Mon, Jun 1, 2026 at 2:24\u202fPM Leonardo Sala via gpfsug-discuss
<a class="moz-txt-link-rfc2396E" href="mailto:gpfsug-discuss@gpfsug.org"><gpfsug-discuss@gpfsug.org></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">
Hallo everyone
I have just notices some possible performance issues on SMB when using CES, at least compared to NFS. Using NFSv4 I can easily get 1 GB/s on a single client (linux), while when using a CIFS mount I get tops 500 MB/s on a single client. Using two separate servers as clients gets a 1 GB/s total throughput on the CES server, so I would say there not a strict limitation on the CES server itself. Any hints on how to improve this / debugging hints? I spent some time on IBM documentation and some user groups talks, but got no improvement...
Thanks!
cheers
leo
--
Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader Data Analysis and Research Infrastructure
Group Leader Data Curation a.i.
Deputy Department Head Science IT Infrastructure and Services department
Science IT Infrastructure and Services department (AWI)
OBBA/230
Forschungstrasse 111
5232 Villigen PSI
Switzerland
Phone: +41 56 310 3369
<a class="moz-txt-link-abbreviated" href="mailto:leonardo.sala@psi.ch">leonardo.sala@psi.ch</a>
<a class="moz-txt-link-abbreviated" href="http://www.psi.ch">www.psi.ch</a>
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</pre>
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