<font size=2 face="sans-serif">Loic,</font><br><br><font size=2 face="sans-serif">It is good to hear that migration is
completed. Did you find any prefetch errors in mmfs.log for the files which
are different between cache and home ? Not all errors are logged, there
is a plan to generate the list of read failed file names after prefetch
completion.</font><br><br><font size=2 face="sans-serif">Informaion about files moving to .ptrash
is documented @</font><br><br><a href=http://www.ibm.com/support/knowledgecenter/STXKQY_4.2.1/com.ibm.spectrum.scale.v4r21.doc/bl1ins_internaldirectoriesAFM.htm><font size=2 color=blue face="sans-serif">http://www.ibm.com/support/knowledgecenter/STXKQY_4.2.1/com.ibm.spectrum.scale.v4r21.doc/bl1ins_internaldirectoriesAFM.htm</font></a><br><br><font size=2 face="sans-serif">~Venkat (vpuvvada@in.ibm.com)</font><br><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">Loic Tortay <tortay@cc.in2p3.fr></font><br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">gpfsug main discussion
list <gpfsug-discuss@spectrumscale.org></font><br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">10/24/2016 10:20 PM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [gpfsug-discuss]
Using AFM to migrate files. (Peter Childs) (Peter Childs) - URL encoding
for pathnames</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>On 10/24/2016 11:44 AM, Venkateswara R Puvvada wrote:<br>> <br>> mmafmctl prefecth expects encoded list file, and it is not documented
<br>> correctly. Issues like memory leak, file descriptor leak, and
fileset <br>> going into Unmounted state were fixed in later releases (4.2.1/4.2.2).
All <br>> your points are correct with respect to AFM migration. There is manual
<br>> intervention required. Also prefetch does not give list of files which
<br>> were failed during data read. Users need to run policy to find all
<br>> uncached files today.<br>> <br>Hello,<br>For the record, I have completed today my AFM migration of a filesystem<br>with 100 million files. Users are now accessing the new filesystem.<br><br>After disabling user access and a last "prefetch", the AFM filesets
were<br>converted to independent filesets.<br>Less than 600 files were then found to be different between the "home"<br>and the "cache" filesystems with a metadata comparison (I just
copied<br>the files from the old filesystem to the new one).<br>I have compared the MD5 of a few thousand randomly selected files and<br>found no differences between the "home" and the "cache"
filesystems.<br>I expect the users to let us know if they find something different (they<br>have been instructed to do so). We'll keep the "home" filesystem
around<br>for some time, just in case there is a problem.<br><br>Maybe something else that should be mentionned in the documentation is<br>what to do with the ".ptrash" directories after the AFM filesets
have<br>been converted. I removed them since they contained files that had<br>clearly been deleted by the users.<br><br><br>Loc.<br>-- <br>| Loc Tortay <tortay@cc.in2p3.fr> - IN2P3 Computing
Centre |<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></font></tt><br><br><BR>