<font size=2 face="sans-serif">I worked on some aspects of SOBAR, but
without studying and testing the commands - I'm not in a position right
now to give simple definitive answers - </font><br><font size=2 face="sans-serif">having said that....</font><br><br><font size=2 face="sans-serif">Generally your questions are reasonable
and the answer is: "Yes it should be possible to do that, but you
might be going a bit beyond the design point..,</font><br><font size=2 face="sans-serif">so you'll need to try it out on a (smaller)
test system with some smaller tedst files.</font><br><br><font size=2 face="sans-serif">Point by point.</font><br><br><font size=2 face="sans-serif">1. If SOBAR is unable to restore a particular
file, perhaps because the premigration did not complete -- you should only
lose that particular file,</font><br><font size=2 face="sans-serif">and otherwise "keep going".
</font><br><br><font size=2 face="sans-serif">2. I think SOBAR helps you build a similar
file system to the original, including block sizes. So you'd have
to go in and tweak the file system creation step(s).</font><br><font size=2 face="sans-serif">I think this is reasonable... If you
hit a problem... IMO that would be a fair APAR.</font><br><br><font size=2 face="sans-serif">3. Similar to 2.<br></font><br><br><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">"Simon Thompson
(Research Computing - IT Services)" <S.J.Thompson@bham.ac.uk></font><br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">"gpfsug-discuss@spectrumscale.org"
<gpfsug-discuss@spectrumscale.org></font><br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">01/20/2017 10:44 AM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">[gpfsug-discuss]
SOBAR questions</font><br><font size=1 color=#5f5f5f face="sans-serif">Sent by:
</font><font size=1 face="sans-serif">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr noshade><br><br><br><tt><font size=2>We've recently been looking at deploying SOBAR to
support DR of some of<br>our file-systems, I have some questions (as ever!) that I can't see are<br>clearly documented, so was wondering if anyone has any insight on this.<br><br>1. If we elect not to premigrate certain files, are we still able to use<br>SOBAR? We are happy to take a hit that those files will never be available<br>again, but some are multi TB files which change daily and we can't stream<br>to tape effectively.<br><br>2. When doing a restore, does the block size of the new SOBAR'd to<br>file-system have to match? For example the old FS was 1MB blocks, the new<br>FS we create with 2MB blocks. Will this work (this strikes me as one way<br>we might be able to migrate an FS to a new block size?)?<br><br>3. If the file-system was originally created with an older GPFS code but<br>has since been upgraded, does restore work, and does it matter what client<br>code? E.g. We have a file-system that was originally 3.5.x, its been<br>upgraded over time to 4.2.2.0. Will this work if the client code was say<br>4.2.2.5 (with an appropriate FS version). E.g. Mmlsfs lists, "13.01<br>(3.5.0.0) Original file system version" and "16.00 (4.2.2.0)
Current file<br>system version". Say there was 4.2.2.5 which created version 16.01<br>file-system as the new FS, what would happen?<br><br>This sort of detail is missing from:<br></font></tt><a href=https://www.ibm.com/support/knowledgecenter/STXKQY_4.2.2/com.ibm.spectrum.s><tt><font size=2>https://www.ibm.com/support/knowledgecenter/STXKQY_4.2.2/com.ibm.spectrum.s</font></tt></a><tt><font size=2><br>cale.v4r22.doc/bl1adv_sobarrestore.htm<br><br>But is probably quite important for us to know!<br><br>Thanks<br><br>Simon<br><br>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></font></tt><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><tt><font size=2>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</font></tt></a><tt><font size=2><br><br></font></tt><br><BR>