Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2017-10-06

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01:55 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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08:58 weller new day, new luck? same issue as before: vfs_gluster shared volume freezes powerpoint/excel & matlab (but not word). same volume, fuse-mounted share has no problems. any ideas?
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11:34 bEsTiAn Hello. we have a setup with two datacenters, servers and clients are spread across. Gluster volumes are replicated between the two datacenters. Is there a way to "force" clients from DC1 to preferably talk to DC1 host, and DC2 clients to preferably talk to DC2 host ? I imagine we can get a latency perf boost this way.
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13:27 lcami1 bEsTiAn: how are the volumes configured? replicas?
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13:38 lcami1 bEsTiAn: Sorry about that saw the replicated descripton in your question just now :).  What are your client NFS or gluster?
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14:21 weller hi, is someone here using ctdb with gluster and could check if a vfs_gluster export works without any issues?
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14:25 nh2 how can I set transport.socket.* options on my volume? Which command can do that?
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16:22 JoeJulian dxlsm: IRC has a line length limit and your question was cut off at "As soon as we added the first set (we"
16:23 JoeJulian Sorry, weller, I gave up on SMB years ago. When I need a windows box to have access to a volume, I use nfs.
16:25 JoeJulian nh2: I do not believe those are exposed as configurable items (I'm double checking). What is your need?
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16:45 nh2 JoeJulian: I'd like to turn on transport.socket.nodelay
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16:50 JoeJulian nh2: according to this, you should be able to set transport.socket.nodelay. Pointlesss, unfortunately, as the default is already true. https://github.com/gluster/glusterfs/blob/master/rpc/rpc-transport/socket/src/socket.c#L4640-L4643
16:50 glusterbot Title: glusterfs/socket.c at master · gluster/glusterfs · GitHub (at github.com)
16:57 nh2 JoeJulian: I thought so too, but my gluster cluster that does not modify that option always logs this "disabling nodelay" here: https://github.com/gluster/glusterfs/blob/master/rpc/rpc-transport/socket/src/socket.c#L4184
16:57 glusterbot Title: glusterfs/socket.c at master · gluster/glusterfs · GitHub (at github.com)
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16:59 nh2 JoeJulian: I think it's because this code, which runs by default, sets it to "off" and overrides the default you linked: https://github.com/gluster/glusterfs/blob/master/rpc/rpc-lib/src/rpc-transport.c#L626
16:59 glusterbot Title: glusterfs/rpc-transport.c at master · gluster/glusterfs · GitHub (at github.com)
17:01 nh2 or is that guaranteed to happen only when the connection is over a unix domain socket?
17:01 JoeJulian looks like it. Every call has "sockfile" or "*filepath"
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17:02 JoeJulian except for the glusterd connections.
17:02 JoeJulian But that's just management so it may not be desirable to have nodelay.
17:03 JoeJulian If you want to be sure, I'd monitor a connection establishment with wireshark.
17:04 JoeJulian That should be a tcp flag, shouldn't it?
17:04 JoeJulian (I could be completely wrong there)
17:04 JoeJulian Maybe strace would be more accurate.
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17:14 nh2 JoeJulian: It is very possible that it is the glusterd connection that I'm seeing in the logs
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17:24 arobihot seeking clarification on Docs/Architecture/TypesofVolumes/Distributed Glusterfs Volume... it says "a brick failure will lead to complete loss of data" are we talking the loss of the data on that one brick, or all bricks?
17:24 JoeJulian I'm lazy. Can I have the full link?
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17:25 arobihot http://docs.gluster.org/en/latest/quick-start-guide/architecture/
17:26 JoeJulian Odd... I get the 404 page.
17:27 arobihot just do the work, i have to hand type the link
17:27 JoeJulian lol
17:27 JoeJulian just do the work? like in the work I get paid for?
17:28 JoeJulian because I tell ya... it's not this irc channel.
17:28 arobihot don't take it like that, it's a couple clicks.
17:28 JoeJulian found it
17:29 JoeJulian That's referring to the data on that brick. A distributed volume spreads files by a hash of the filename across all the bricks in the volume. Since there's no replication in that structure, files on only that brick would be lost.
17:31 arobihot that's great, thanks for this trip down irc memory lane.
17:31 JoeJulian hehe
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17:31 JoeJulian It still beats subscribing to 50 different slack orgs. :D
17:32 JoeJulian (ok, so I'm only in about a dozen, but it's still a pain point)
17:33 arobihot hm, not familiar, I'll take your word for it. Thank alot JoeJulian, have a good weekend
17:34 JoeJulian You too!
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18:22 gladoslies Hello! I'm new to Gluster and currently trying to learn and use in a college project. I'm wondering, is there web gui that can be used for simple management/monitoring?
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18:48 JoeJulian gladoslies: nopee
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19:03 amye welll, JoeJulian is technically correct. There is a new thing called Tendrl that is a unified storage manager - https://github.com/Tendrl
19:03 glusterbot Title: Tendrl · GitHub (at github.com)
19:04 amye It is not a monitoring tool in that way though. :/
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19:11 arobihot scenario: 2 bricks in a distributed volume, filled with many folders of pictues ... if one brick is destroyed, what do I have left? folders with missing pictures or missing folders? I was reading about dist hash table, but could not resolve
19:13 arobihot oops forgot to greet... hey people!
19:20 arobihot ~/help
19:22 arobihot help
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19:22 arobihot sorry that was menat to be the slash command for help
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20:13 gladoslies Ah, got it. Thank you! looking through the documentation and GitHub, there are some API options. Could I use those to create my own basic gui to say, create volumes and view node status?
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21:14 JoeJulian arobihot: If one brick is destroyed in that scenario, you still have the other brick with (roughly) half the files.
21:15 JoeJulian For a technical rundown on how DHT works, see https://joejulian.name/blog/dht-misses-are-expensive/
21:15 glusterbot Title: DHT misses are expensive (at joejulian.name)
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23:21 arobihot JoeJulian: thanks for the link. I will have a moment later to read it.
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