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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">The caches are RO. Thanks that’s exactly what I tested, its just the infocenter threw me when it said it expects the home to be empty…..
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">This was the command I used
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">mmafmctl cachefs1 failover -j NICKTESTFSET --new-target nfs://10.0.0.142/ibm/scalefs2/fsettest
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<p class="MsoNormal">Appreciate the confirmation<o:p></o:p></p>
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<p class="MsoNormal">Nick<o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org>
<b>On Behalf Of </b>Venkateswara R Puvvada<br>
<b>Sent:</b> Monday, 23 April 2018 8:56 PM<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject:</b> Re: [gpfsug-discuss] AFM cache re-link<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">What is the fileset mode ? AFM won't attempt to copy the data back to home if file data already exists (checks if file size, mtime with nano seconds granularity and number of
data blocks allocated are same). For example rsync version >= 3.1.0 keeps file mtime in sync with nano seconds granularity. Copy the data from old home to new home and run failover command from cache to avoid resynching the entire data.</span><br>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif">~Venkat (<a href="mailto:vpuvvada@in.ibm.com">vpuvvada@in.ibm.com</a>)</span><br>
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<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Nick Savva <<a href="mailto:nick.savva@adventone.com">nick.savva@adventone.com</a>></span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"'gpfsug-discuss@spectrumscale.org'" <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>></span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">04/22/2018 05:48 PM</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">[gpfsug-discuss] AFM cache re-link</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Sent by: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif"><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a></span><o:p></o:p></p>
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<span style="font-size:10.0pt">Hi all,</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">I was always preface my questions with an apology first up if this has been covered before.</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">I am curious if anyone has tested relinking an AFM cache to a new home where the new home, old home and cache have the exact same data. What is the behaviour?
</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">The infocenter and documentation say the cache expects home to be empty. I did a small test and it seems to work but it may have happened too fast for me to notice any data movement.
</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">If anyone is interested in the use case, I am attempting to avoid pulling data from production over the link. The idea is to sync the data locally in DR to the cache, and then relink the cache to production. Where prod/dr are
gpfs filesystems with a replica set of data. Again its to avoid moving TB’s across the link that are already there.</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">Appreciate the help in advance,</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">Nick</span><br>
<span style="font-size:10.0pt"> </span><br>
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<span style="font-size:10.0pt"> </span><tt><span style="font-size:10.0pt">_______________________________________________</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<tt>gpfsug-discuss mailing list</tt><br>
<tt>gpfsug-discuss at spectrumscale.org</tt><br>
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