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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Perhaps I misunderstand here, but if the tenants have administrative (ie:root) privileges to the underlying file system management commands I think mmunlinkfileset might be a minor
concern here. There are FAR more destructive things that could occur. <br>
<br>
I am not an OpenStack expert and I've not even looked at anything past Kilo, but my understanding was that these commands were not necessary for tenants. They access a virtual block device that backs to GPFS, correct?
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Ed Wahl<br>
OSC<br>
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++<br>
From:</b> gpfsug-discuss-bounces@gpfsug.org [gpfsug-discuss-bounces@gpfsug.org] on behalf of Luke Raimbach [Luke.Raimbach@crick.ac.uk]<br>
<b>Sent:</b> Monday, June 15, 2015 4:35 AM<br>
<b>To:</b> gpfsug-discuss@gpfsug.org<br>
<b>Subject:</b> [gpfsug-discuss] OpenStack Manila Driver<br>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">Dear All,</span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222"> </span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">We are looking forward to using the manila driver for auto-provisioning of file shares using GPFS. However, I have some concerns...</span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222"> </span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">Manila presumably gives tenant users access to file system commands like mmlinkfileset and mmunlinkfileset. Given that mmunlinkfileset quiesces the file system, there is potentially
an impact from one tenant on another - i.e. someone unlinking and deleting a lot of filesets during a tenancy cleanup might cause a cluster pause long enough to trigger other failure events or even start evicting nodes. You can see why this would be bad in
a cloud environment.</span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222"> </span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">Has this scenario been addressed at all?</span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222"> </span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">Cheers,</span></p>
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<span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:#222222">Luke.</span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">Luke Raimbach</span></b><b><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#595959">\u200b</span></b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">Senior HPC Data and Storage Systems Engineer</span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">The Francis Crick Institute</span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">Gibbs Building</span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">215 Euston Road</span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">London NW1 2BE</span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"></span></b></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">E: </span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"><a href="mailto:luke.raimbach@crick.ac.uk" target="_blank"><span style="color:blue; font-weight:normal">luke.raimbach@crick.ac.uk</span></a></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#595959">W: </span><b><span style="font-size:10.0pt; font-family:"Trebuchet MS","sans-serif"; color:#212121"><a href="http://www.crick.ac.uk/" target="_blank"><span style="color:blue; font-weight:normal">www.crick.ac.uk</span></a></span></b></p>
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The Francis Crick Institute Limited is a registered charity in England and Wales no. 1140062 and a company registered in England and Wales no. 06885462, with its registered office at 215 Euston Road, London NW1 2BE.
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