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<p class="MsoNormal"><span lang="EN-US">Dear<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We would like to start using the generic burst buffer plugin.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For this I read the <a href="https://slurm.schedmd.com/burst_buffer.html">
burst buffer guide</a>, however I’ve not been able to replicate the listed examples.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In slurm.conf, the generic burst buffer was enabled via:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <span style="color:#0070C0">
BurstBufferType=burst_buffer/generic<o:p></o:p></span></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">DebugFlags=BurstBuffer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the same directory, “burst_buffer_generic.conf”, was created with:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#0070C0"> StageInTimeout=300<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">AllowUsers=centos<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">JobSizeLimit=200GB # Applies to each job<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">UserSizeLimit=500GB # Applies to each user<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">StartStageIn=/home/centos/stageIn.sh<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(No reference is made to this file in any of the other configuration files of slurm)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#0070C0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When running for example:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US" style="color:#0070C0">srun --bb="capacity=1G access=striped type=scratch" ls<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Or following script, executed via sbatch<o:p></o:p></span></p>
<pre><span lang="EN-US" style="color:#0070C0"> </span><span lang="en-BE" style="color:#0070C0">#!/bin/bash<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000"> #BB create_persistent name=alpha capacity=32GB access=striped type=scratch<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000"> #DW jobdw type=scratch capacity=1GB access_mode=striped<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000"> #DW stage_in type=file source=/home/</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000">centos</span><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000">/data.in
destination=$DW_JOB_STRIPED/data<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000"> #DW stage_out type=file destination=/home/</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000">centos</span><span lang="en-BE" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000">/data.out
source=$DW_JOB_STRIPED/data<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0070C0;mso-fareast-language:#2000"> ls</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:#2000"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The command all executes without any errors (even when the source files are not available).
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But When checking the burst buffer state via:<o:p></o:p></span></p>
<pre style="text-indent:36.0pt"><span lang="en-BE" style="color:#0070C0">scontrol show burst<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US">The output is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is there something I’m missing?<br>
Or misconfiguring? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks in advance!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#0070C0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Johan Hofmans<o:p></o:p></span></p>
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