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<p>Sorry Mahmood,</p>
<p>10 GB per node is requested not 200 GB per node. For all nodes this counts in total to 40 GB as you request 4 nodes. The number of tasks per node does not matter for this limit.</p>
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<div name="divtagdefaultwrapper" style="margin:0px"><font style="" size="2" face="Arial,Helvetica,sans-serif">Best ;-)<br>
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<div name="divtagdefaultwrapper" style="margin:0px"><font style="" size="2" face="Arial,Helvetica,sans-serif">Sebastian<br>
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</span></font><font style=""> </font><br>
<br>
Sebastian Kraus<br>
Team IT am Institut für Chemie<br>
</font><font style="" face="Arial, Helvetica, sans-serif">Gebäude C, Straße des 17. Juni 115, Raum C7<br>
<br>
Technische Universität Berlin<br>
Fakultät II<br>
Institut für Chemie<br>
Sekretariat C3<br>
Straße des 17. Juni 135<br>
10623 Berlin<br>
<br>
<br>
</font></font><font style="" face="Arial,Helvetica,sans-serif"><font size="1"><font style="" face="Arial,Helvetica,sans-serif">Tel.: +49 30 314 22263
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Fax: +49 30 314 29309<br>
</font>Email: sebastian.kraus@tu-berlin.de<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> slurm-users <slurm-users-bounces@lists.schedmd.com> on behalf of Mahmood Naderan <mahmood.nt@gmail.com><br>
<b>Sent:</b> Monday, December 16, 2019 07:56<br>
<b>To:</b> Slurm User Community List<br>
<b>Subject:</b> Re: [slurm-users] Question about memory allocation</font>
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<div class="gmail_default" style="font-family:tahoma,sans-serif"><font size="2" face="Arial,Helvetica,sans-serif">>your job will be only runnable on nodes that offer at least 200 GB main memory (sum of memory on all sockets/cpu of >the node)</font>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">But according to the manual</div>
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<div class="gmail_default" style="font-family:tahoma,sans-serif"><dt><b>--mem</b>=<<i>size[units]</i>></dt><dd>Specify the real memory required per node. </dd></div>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">so, with <br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">#SBATCH --mem=10GB<br>
#SBATCH --nodes=4<br>
#SBATCH --ntasks-per-node=5 <br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">the total requested memory should be 40GB and not 200GB.<br>
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<div dir="ltr"><font face="tahoma,sans-serif">Regards,<br>
Mahmood</font><br>
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<div dir="ltr" class="gmail_attr">On Mon, Dec 16, 2019 at 10:19 AM Mahmood Naderan <<a href="mailto:mahmood.nt@gmail.com">mahmood.nt@gmail.com</a>> wrote:<br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif"><span class="gmail_default" style="font-family:tahoma,sans-serif">></span><span class="gmail_default" style="font-family:tahoma,sans-serif">No, this indicates the amount of residual/real memory
as reqeusted per node. Your job will be only runnable on nodes >that offer at least 200 GB main memory (sum of memory on all sockets/cpu of the node). Please also have a closer look >at man sbatch.
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<div class="gmail_default" style="font-family:tahoma,sans-serif">Thanks.</div>
<div class="gmail_default" style="font-family:tahoma,sans-serif">Regarding the status of the nodes, I see</div>
<div class="gmail_default" style="font-family:tahoma,sans-serif"> RealMemory=120705 AllocMem=1024 FreeMem=309 Sockets=32 Boards=1
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<div class="gmail_default" style="font-family:tahoma,sans-serif">The question is why freemem is so much low while allocmem is far less than realmemory?</div>
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<div dir="ltr"><font face="tahoma,sans-serif">Regards,<br>
Mahmood</font><br>
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<div dir="ltr" class="gmail_attr">On Mon, Dec 16, 2019 at 10:12 AM Kraus, Sebastian <<a href="mailto:sebastian.kraus@tu-berlin.de" target="_blank">sebastian.kraus@tu-berlin.de</a>> wrote:<br>
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<p>Hi Mahmood,</p>
<p><br>
</p>
<p>>> will it reserve (looks for) 200GB of memory for the job? Or this is the hard limit of the memory required by job?<br>
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<div name="divtagdefaultwrapper" style="margin:0px"><font size="2" face="Arial,Helvetica,sans-serif"><span class="gmail_default" style="font-family:tahoma,sans-serif"></span>No, this indicates the amount of residual/real memory as reqeusted per node. Your job
will be only runnable on nodes that offer at least 200 GB main memory (sum of memory on all sockets/cpu of the node). Please also have a closer look at man sbatch.<br>
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<div name="divtagdefaultwrapper" style="margin:0px"><font size="2" face="Arial,Helvetica,sans-serif">Best<br>
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<div name="divtagdefaultwrapper" style="margin:0px"><font size="2" face="Arial,Helvetica,sans-serif">Sebastian<br>
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</span></font><font> </font><br>
<br>
Sebastian Kraus<br>
Team IT am Institut für Chemie</font><font face="Arial, Helvetica, sans-serif"><br>
<br>
Technische Universität Berlin<br>
Fakultät II<br>
Institut für Chemie<br>
Sekretariat C3<br>
Straße des 17. Juni 135<br>
10623 Berlin<br>
</font></font><font face="Arial,Helvetica,sans-serif"><font size="1"><font face="Arial,Helvetica,sans-serif"><br>
</font>Email: <a href="mailto:sebastian.kraus@tu-berlin.de" target="_blank">sebastian.kraus@tu-berlin.de</a><br>
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<font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> slurm-users <<a href="mailto:slurm-users-bounces@lists.schedmd.com" target="_blank">slurm-users-bounces@lists.schedmd.com</a>> on behalf of Mahmood Naderan <<a href="mailto:mahmood.nt@gmail.com" target="_blank">mahmood.nt@gmail.com</a>><br>
<b>Sent:</b> Monday, December 16, 2019 07:19<br>
<b>To:</b> Slurm User Community List<br>
<b>Subject:</b> [slurm-users] Question about memory allocation</font>
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<div style="font-family:tahoma,sans-serif">Hi,</div>
<div style="font-family:tahoma,sans-serif">If I write</div>
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<div style="font-family:tahoma,sans-serif">#SBATCH --mem=10GB<br>
#SBATCH --nodes=4<br>
#SBATCH --ntasks-per-node=5</div>
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<div style="font-family:tahoma,sans-serif">will it reserve (looks for) 200GB of memory for the job? Or this is the hard limit of the memory required by job?</div>
<div style="font-family:tahoma,sans-serif"><br>
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<div dir="ltr"><font face="tahoma,sans-serif">Regards,<br>
Mahmood</font><br>
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