Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2017-11-28

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02:57 Topic for #gluster is now Gluster Community - https://www.gluster.org | Documentation - https://gluster.readthedocs.io/en/latest/ | Patches - https://review.gluster.org/ | Developers go to #gluster-dev | Channel Logs - https://botbot.me/freenode/gluster/ & http://irclog.perlgeek.de/gluster/
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04:38 JoeJulian What??? No it doesn't.
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08:10 david_ Hi :)
08:13 david_ I have 100k files in one folder (smallfiles), for copy this folder into glusterfs server can I copy files directly to bricks?
08:14 david_ gluster has any sync/balance method for this purpose? I try this, but can't see any files from the gluster client.
08:22 jkroon david_, i've never actually tried it, but have wondered the same thing.
08:22 jkroon my gut is thinking that it *may* be possible, in a 2-brick replica.
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08:26 ivan_rossi it is sometimes possible, with a trick, but is BAD PRACTICE and the gains are not that much.
08:26 ivan_rossi would yyou preload data to db bypassing the db engine and writing directly to the db files? my guess is NO.
08:27 jkroon ivan_rossi, i had a case where I had existing data on a single-server now where i wanted to do this, eventually had to bring up glusterfs, kill the two bricks locally, copy everything up to the other side and then delete the original data and then initiate a heal.
08:28 ivan_rossi as i said it is possible but these re hacks meant for emergency repairs.
08:29 ivan_rossi anyway: your cluster...
08:29 jkroon ok, so short version: avoid if at all possible to manipulate the bricks directly :)
08:29 ivan_rossi That's IT.
08:31 jkroon makes sense.  did have a case where somehow the files on one of the bricks had size zero, rm'ed the zero-sized files from the brick and ran a stat on the mounted filesystem triggering a heal, which resolved it.  i'm still worried as to HOW the zero-sized files came in there, as well as why normal heal process didn't pick up on it.
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08:31 ivan_rossi is it a replica 2?
08:31 jkroon yes
08:31 jkroon 3.12.2
08:32 jkroon if it was arbiter i'd understand.
08:32 jkroon in fact, i'd expect the arbiter to have 0-size.
08:32 jkroon all other meta data was identical on the files ... which is why i find it so bizarre.
08:33 jkroon takes me 4-5 days to perform a checksum comparison of the data on the bricks ... so not something I want to do too regularly.
08:34 ivan_rossi if metadata are identical that was a split brain.
08:35 ivan_rossi with r2 is relatively easy to get. that's why i always use r3.
08:36 jkroon r2 vs r3 ?
08:36 jkroon as in major, minor, revision?
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08:56 ivan_rossi jkroon: no. as in replica-2 vs replica-3
08:57 ivan_rossi or replica-2+arbiter (r3-  ?? ;) )
09:00 jkroon ah ok :)
09:01 jkroon yes, i agree, i don't always have a third machine available to run the arbiter.
09:02 jkroon ivan_rossi, but a split-brain should still report ... gluster volume heal .. info showed no entries to heal.
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09:12 ivan_rossi did the files look OK (not zero-len) from the client? if so glfs managd to understand what was the good copy. but on r2 sometimes i found that sometimes it happens. gluster can trigger repairs on file access. But how exactly heal is triggered i do not know. that's for the devs to answer.
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09:58 jkroon ivan_rossi, the stat() call triggers heal as I understand.  and I did an explicit stat.  I could perhaps have tried just doing a cat of the file.  The files I did check was indeed OK via the client.
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10:47 mbrgm I'm running a cluster on 3.6.9 and am planning to upgrade to the latest 3.12.x version. I am able to schedule a downtime for the upgrade. Do I need to take intermediate steps, i.e. upgrade 3.6 -> 3.8 -> 3.12, or is upgrading from 3.6.9 -> 3.12.x fine (given the cluster is offline)?
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11:04 jkroon i did a 3.7 to 3.12 no downtime yesterday.
11:05 jkroon the only "downtime" was eventually on the clients where the fuse mount needed to be remounted, eg:  umount -fl /mnt/where; mount /mnt/where (which is probably not the cleanest way but it worked)
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15:01 amye Gluster Developer Conversations, happening now:  https://redhat.bluejeans.com/6203770120/
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15:04 cloph amye: any more infos on that? target audience developers?
15:05 amye Anyone who wanted to come and present!
15:05 amye This is a followup from Gluster Summit, we'll do them more often.
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