Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2017-11-06

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All times shown according to UTC.

Time Nick Message
00:02 protoporpoise Started a thread on the *shudder* mailinglist *shudder*: https://lists.gluster.org/pipermail/gluster-users/2017-November/032824.html
00:02 glusterbot Title: [Gluster-users] Gluster clients can't see directories that exist or are created within a mounted volume, but can enter them. (at lists.gluster.org)
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01:50 VanDuong Hi everyone,
01:51 VanDuong Anybody config tier SSD on gluster 3.12?
01:53 VanDuong i'm try config tier with cmd: gluster volume tier test-volume attach replica 2 node1:/mnt/tier1 node2:/mnt/tier1
01:53 VanDuong but check status tier daemon not running
01:54 VanDuong Tried search on google and maillist but not have useful info
01:55 VanDuong Could you tell me what wrong, thanks you
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02:55 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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08:54 om2 Any recommendations for kernel tuning?
08:54 om2 I have 4 x 4 core 8 GB ram 1 TB SATA3 HWRAID 10
08:55 om2 serving a lot of small files on one volume to 3 x 32 core 128 GB ram 100 GB SATA3 HWRAID 60
08:56 om2 would appreciate url's to info on this... I found this one helpful but I believe we have a higher performance need.  We have 10 Gbps networks and low latencies
08:56 om2 http://lists.gluster.org/pipermail/gluster-users/2015-November/024435.html
08:56 glusterbot Title: [Gluster-users] GlusterFS Performance tuning (at lists.gluster.org)
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09:14 bartden Hi, i want to rename a volume (use the same brick under another volume). How can i do this? It is a single node distributed cluster ...
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09:46 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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17:12 mallorn Is there a setting I'm missing?  We have a dispere-distributed set (3 x (4 + 1)), but 65% of the files that have been created are appearing on one of the sets.  Another set has 30%, and the last set has 5% of the files.
17:13 mallorn Sorry, distributed-disperse.  Got that switched.
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18:14 JoeJulian mallorn: The first half of this article explains how dht distribution works: https://joejulian.name/blog/dht-misses-are-expensive/
18:14 glusterbot Title: DHT misses are expensive (at joejulian.name)
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18:41 mallorn I was hoping there was a way to override the settings.  Sounds like we've just been unlucky and have to hope that our luck changes.
18:44 mallorn If a set fills up, are we out of luck if DHT tries to put it there?
18:45 JoeJulian If I were to hazard a guess - when I've seen that behavior before it's because the first part of the filename is always the same.
18:49 mallorn The filenames all start with 'volume-' -- they're cinder volumes for OpenStack.
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19:00 mallorn Ugh.  And it looks like the GlusterFS driver for OpenStack doesn't store the full filename; it's only the hash without 'volume-' prepended to it.  So if I change the volume_name_template variable in cinder old volumes will fail unless I rename them.
19:05 JoeJulian hmm, yeah, I wonder why mine didn't do that.
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19:07 JoeJulian `hash = gf_dm_hashfn (name, strlen (name));` so it does use the whole filename....
19:07 jkroon JoeJulian, you sure?  that strlen really hints that the whole name is used for the hash?
19:08 jkroon oh sorry, my glasses are apparently not on.
19:09 JoeJulian It does break the string up into chunks of 16 bytes but with the uuid on the volume filenames that should give plenty of variance.
19:09 int-0x21 Hi, Anyone have any best practise recomendation for volume settings when used for a vmware storage ? (NFS Ganesha ATM)
19:09 JoeJulian Did this volume add dht subvolumes over time?
19:09 JoeJulian bbiab... meeting time.
19:12 int-0x21 Atm in a test im getting about 200MB/sec with 64K bs random writes it feels a little low on replicated nvme disks 100GB backend on cluster and 25GB from vmware to ganesha
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20:05 mallorn We're noticing the volume distribution now (we created it all four months ago and haven't really touched it since) because that set has been in a healing state for over a month now.
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