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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Daniel,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It’s funny you mention compression & quotas – it’s something I’ve hit on a.n.other system. The supplier ended up providing different
ways of presenting quotas as a mount option. Options are:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Quotas are tracked using the post compression/dedupe actually used space. (i.e. users see the benefit/drawback of compression)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Quotas are tracked using the pre compression/dedupe filesize. (i.e. the sysadmin sees the benefit; users are unaware what’s
happening underneath).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Would something similar be possible in GPFS land?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">David<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> gpfsug-discuss-bounces@spectrumscale.org [mailto:gpfsug-discuss-bounces@spectrumscale.org]
<b>On Behalf Of </b>Daniel Kidger<br>
<b>Sent:</b> 04 May 2016 12:36<br>
<b>To:</b> gpfsug-discuss@spectrumscale.org<br>
<b>Cc:</b> gpfsug-discuss@spectrumscale.org<br>
<b>Subject:</b> Re: [gpfsug-discuss] Data replication and fileset quotas<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">As Simon says, Quota measures used blocks in the filesystem.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Hence users can and should have behaviour that keeps within these limits.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">GPFS Replication though is a system-administrator level concept - to protect data access in the case of power outages or though gross hardware failures. So as such should be
transparent to the end users.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Unless users are enabled to choose 1 or 2 (or 3) way replication of their own files dependent on their importance (eg 1 copy for scratch files) then imho replication should not
be measured in quota reporting.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">On a related note, compression is great new feature, but it may confuse users if they delete some older but big 100GB files then try and recreate them only to find they can't
because their quota is now exceeded (as compression is not at file creation but driven later by policies.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Thoughts?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Verdana",sans-serif">Daniel</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Dr Daniel Kidger</span></strong><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif">IBM Technical Sales Specialist<br>
Software Defined Solution Sales<br>
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+</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F">44-07818 522 266
</span><br>
<span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#5F5F5F"><a href="mailto:daniel.kidger@uk.ibm.com">daniel.kidger@uk.ibm.com</a></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"> </span><span style="font-size:8.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">----- Original message -----<br>
From: "Oesterlin, Robert" <<a href="mailto:Robert.Oesterlin@nuance.com">Robert.Oesterlin@nuance.com</a>><br>
Sent by: <a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a><br>
To: gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>><br>
Cc:<br>
Subject: Re: [gpfsug-discuss] Data replication and fileset quotas<br>
Date: Wed, May 4, 2016 12:19 PM<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">From the documentation:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:whitesmoke">"When setting quota limits for a file system, replication within the file system should be considered. GPFS quota management takes replication
into account when reporting on and determining if quota limits have been exceeded for both block and file usage. In a file system that has either type of replication set to a value of two, the values reported on by both the mmlsquota command and the mmrepquota
command are double the value reported by the ls command."</span><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:black">Bob Oesterlin<br>
Sr Storage Engineer, Nuance HPC Grid<br>
507-269-0413<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"Calibri",sans-serif;color:black">From:
</span></b><span style="font-family:"Calibri",sans-serif;color:black"><<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank">gpfsug-discuss-bounces@spectrumscale.org</a>> on behalf of "Simon Thompson (Research Computing - IT Services)" <<a href="mailto:S.J.Thompson@bham.ac.uk" target="_blank">S.J.Thompson@bham.ac.uk</a>><br>
<b>Reply-To: </b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org" target="_blank">gpfsug-discuss@spectrumscale.org</a>><br>
<b>Date: </b>Wednesday, May 4, 2016 at 2:11 AM<br>
<b>To: </b>'gpfsug main discussion list' <<a href="mailto:gpfsug-discuss@spectrumscale.org" target="_blank">gpfsug-discuss@spectrumscale.org</a>><br>
<b>Subject: </b>[EXTERNAL] Re: [gpfsug-discuss] Data replication and fileset quotas<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><a name="_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><br>
<br>
<br>
Yes, this correct (I think there was some discussion on the mailing list a little while back).<br>
<br>
The quota is the space used on disk, so if you run compression its the compressed size, tape hsm don't count until you recall them.<br>
<br>
I assume mcstore is the same, I.e. Only counts on recall, but I haven't tested this.<br>
<br>
Simon<br>
<br>
--<br>
<br>
Simon Thompson<br>
<br>
Research Computing Team, IT Services<br>
<br>
+44 121 415 8675<br>
<br>
-----Original Message-----<br>
<b>From: </b>Bryan Banister [</span></a><a href="mailto:bbanister@jumptrading.com" target="_blank"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">bbanister@jumptrading.com</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">]<br>
<b>Sent: </b>Tuesday, May 03, 2016 09:33 PM GMT Standard Time<br>
<b>To: </b>gpfsug main discussion list<br>
<b>Subject: </b>Re: [gpfsug-discuss] Data replication and fileset quotas<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Yes, I believe that is the case due to the fact that every file is replicated therefore taking twice as much space within the file
system.</span></span><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Bryan</span></span><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span></span><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b></span><span style="mso-bookmark:_MailOriginalBody"></span><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">gpfsug-discuss-bounces@spectrumscale.org</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">
[</span></span><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">mailto:gpfsug-discuss-bounces@spectrumscale.org</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">]
<b>On Behalf Of</b> Buterbaugh, Kevin L<br>
<b>Sent:</b> Tuesday, May 03, 2016 3:27 PM<br>
<b>To:</b> gpfsug main discussion list <</span></span><a href="mailto:gpfsug-discuss@spectrumscale.org" target="_blank"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">gpfsug-discuss@spectrumscale.org</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">><br>
<b>Subject:</b> [gpfsug-discuss] Data replication and fileset quotas</span></span><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Hi again all,<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">I have another question on a completely different topic and therefore I decided it was better to send two separate e-mails.<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">For a number of years now we have had a GPFS filesystem where we use filesets and set fileset quotas. Data replication is set to one. I understand
how that all works.<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">We are creating another GPFS filesystem where we intend to also use filesets and fileset quotas, but set data replication to two. Based on my experience
with data replication on a filesystem that doesn’t use filesets, I am expecting that setting data replication to two means that I will need to double the quota for each fileset (i.e. if a group has bought 5 TB of space I’ll need to set their fileset quota
to 10 TB) but haven’t found where that is explicitly documented. Is that correct?<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Thanks again, all…<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Kevin<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">—<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Kevin Buterbaugh - Senior System Administrator<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Vanderbilt University - Advanced Computing Center for Research and Education<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"></span><a href="mailto:Kevin.Buterbaugh@vanderbilt.edu" target="_blank"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Kevin.Buterbaugh@vanderbilt.edu</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> -
(615)875-9633<o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></span></p>
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