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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 Dean,<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">Thanks for this – I had hoped this was the case. However what I’m now wondering is, if we operate the cache in independent-writer mode
and the new file was pushed back home (conforming to cache, then home placement policies), then is subsequently evicted from the cache; if it needs to be pulled back for local operations in the cache, will the cache cluster see this file as “new” for the third
time?<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">Cheers,<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">Luke.<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></a></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>Dean Hildebrand<br>
<b>Sent:</b> 24 February 2016 19:17<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Cc:</b> gpfsug main discussion list <gpfsug-discuss@gpfsug.org><br>
<b>Subject:</b> Re: [gpfsug-discuss] AFM and Placement Policies<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi Luke,<br>
<br>
The short answer is yes, when the file is created on the home, it is a 'brand new' creation that will conform to any and all new placement policies that you set on the home site. So if you are using NFS in the relationship, then it is simply created just like
any other file is created over NFS. The same goes when using GPFS to the home cluster...<br>
<br>
Dean<br>
IBM Almaden Research Center<br>
<br>
<br>
<img width="16" height="16" id="_x0000_i1025" src="cid:image001.gif@01D17083.C191CE80" alt="Inactive hide details for Luke Raimbach ---02/24/2016 06:05:43 AM---Hi All, I have two GPFS file systems (A and B) and an AFM S"><span style="color:#424282">Luke Raimbach
---02/24/2016 06:05:43 AM---Hi All, I have two GPFS file systems (A and B) and an AFM Single Writer relationship: /fsB/cache wri</span><br>
<br>
<span style="font-size:10.0pt;color:#5F5F5F">From: </span><span style="font-size:10.0pt">Luke Raimbach <<a href="mailto:Luke.Raimbach@crick.ac.uk">Luke.Raimbach@crick.ac.uk</a>></span><br>
<span style="font-size:10.0pt;color:#5F5F5F">To: </span><span style="font-size:10.0pt">gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>></span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Date: </span><span style="font-size:10.0pt">02/24/2016 06:05 AM</span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Subject: </span><span style="font-size:10.0pt">[gpfsug-discuss] AFM and Placement Policies</span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Sent by: </span><span style="font-size:10.0pt"><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a></span><o:p></o:p></p>
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<br>
<br>
<tt><span style="font-size:10.0pt">Hi All,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>I have two GPFS file systems (A and B) and an AFM Single Writer relationship: /fsB/cache writes back to /fsA/home</tt><br>
<br>
<tt>I have a placement policy which sets extended attributes on file creation in /fsB/cache.</tt><br>
<br>
<tt>When I create a new file in /fsB/cache/new.file and it is pushed back by AFM to /fsA/home/new.file, can the home fileset apply a different placement policy to add or modify extended attributes? I guess the deeper question is does each file system in this
arrangement see the new.file as "new" in both locations?</tt><br>
<br>
<tt>Cheers,</tt><br>
<tt>Luke.</tt><br>
<br>
<tt>Luke Raimbach</tt></span><tt><span style="font-size:10.0pt;font-family:"Cambria Math",serif"></span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<tt>Senior HPC Data and Storage Systems Engineer,</tt><br>
<tt>The Francis Crick Institute,</tt><br>
<tt>Gibbs Building,</tt><br>
<tt>215 Euston Road,</tt><br>
<tt>London NW1 2BE.</tt><br>
<br>
<tt>E: <a href="mailto:luke.raimbach@crick.ac.uk">luke.raimbach@crick.ac.uk</a></tt><br>
<tt>W: <a href="http://www.crick.ac.uk">www.crick.ac.uk</a></tt><br>
<br>
<tt>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.</tt><br>
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</span><br>
<br>
<o:p></o:p></p>
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