Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2016-06-20

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01:48 Topic for #gluster is now Gluster Community - http://gluster.org | Documentation - https://gluster.readthedocs.io/en/latest/ | Patches - http://review.gluster.org/ | Developers go to #gluster-dev | Channel Logs - https://botbot.me/freenode/gluster/ & http://irclog.perlgeek.de/gluster/
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10:23 rhqq how can i see clients with most traffic?
10:27 post-factum rhqq: "gluster volume status SoMeVoLuMe clients" will show you that info
10:27 rhqq thank you
10:29 rhqq thats cumultative, any way (other than scripting to get the interval ?
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11:04 micw hi
11:04 glusterbot micw: Despite the fact that friendly greetings are nice, please ask your question. Carefully identify your problem in such a way that when a volunteer has a few minutes, they can offer you a potential solution. These are volunteers, so be patient. Answers may come in a few minutes, or may take hours. If you're still in the channel, someone will eventually offer an answer.
11:04 micw how do i set read-subvolume?
11:04 micw i have a 3-node-3-replica cluster. all nodes have the volume mounted locally
11:04 micw i'd like to have reads locally
11:16 rhqq is it safe to upgrade from 3.6.x to 3.8.x ?
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11:21 Geronimo74 Hiya! Does anybody here have some experiences on GlusterFS in a CloudStack environment (Especially with GlusterFS on the compute hosts) he'd like to share with me?
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11:23 Geronimo74 Or she (No offence meant, ladies ... if present)
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11:29 itisravi micw: local mounts by default should read from the local bricks.
11:31 micw seems not to work. if i do a "find /mnt" on my locally mounted gluster node, i get high load on the other nodes
11:31 micw afaik those should not even be accessed
11:32 micw i set: gluster volume set backups cluster.read-hash-mode 0
11:32 rhqq that seems to be bug 1165041 ;)
11:32 glusterbot Bug https://bugzilla.redhat.com:443/show_bug.cgi?id=1165041 high, unspecified, ---, xhernandez, CLOSED CURRENTRELEASE, Different client can not execute "for((i=0;i<1000;i++));do ls -al;done" in a same directory at the sametime
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11:38 micw rhqq, i can't see how this ins related with the ability to read from local nodes
11:39 rhqq that goes through entire structure
11:39 rhqq you dont just read local node
11:39 rhqq that's a replica, so there's always cache coherency check and so on
11:45 micw ok
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11:46 rhqq i wish there were upgrade notes for 3.8 :(
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11:51 itisravi lookups for a file are always sent to all the bricks of the replica. That's how it figures which is/are the good copies. The inode read FOPS like readv, getfattr etc should be served from the local brick if it happens to be a good copy.
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12:02 micw my workload is: 3 servers, 4 hdds each, 12 bricks, one large volume replicated over the 3 servers, distributed over the 4 disks. the volume is mounted locally on all nodes. against the volume runs rsync based backups
12:02 micw the backupes structures are quite large (millions of files, several TB)
12:03 micw it takes long time for rsync to determine what is changes (that's alomst read workload)
12:03 micw is there a way to optimize this?
12:04 micw (the 3 servers are distributed over 3 locations, 1 gbit connection, latency ~0.3ms)
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20:20 RustyB has anyone tried running nfs-ganesha with gluster on a debian based system? i managed to get it installed (finally, had to compile it by hand) because the packages and configs in the launchpad repo and download repo are just wrong and meant for rhel
20:20 RustyB however gluster enable nfs-ganesha fails with no really useful error
20:21 RustyB im going to test it all on a rhel based system tonight to see if it "just works", but was wondering if anyone had experience with debian based systems
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20:53 pwa Trying to migrate to GlusterFS from a non-clustered system to a 3-node glusterfs replicated cluster using scripts.  Tried various things to make this work, but we always end up in an indesirable state where if you call "gluster volume heal <vol-name> full", we would get the error message, "Launching heal operation to perform full self heal on volume <vol-name> has been unsuccessful on bricks that are down. Please check if all brick proc
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20:56 pwa We haven't tried creating an empty 3-node glusterfs and then copying all the data into it.  But we want to avoid this since this would require an outage longer than a couple of hours to possibly days depending on the amount of data
20:57 pwa Also something to note, when we do it by hand instead of scripting it, it usually works (not all the time, but more often than not)
21:02 pwa Actually, we just tried the empty 3-node glusterfs way and that also produced the error "Launching heal operation to perform full self heal on volume appian has been unsuccessful on bricks that are down. Please check if all brick processes are running."
21:03 pwa We are currently using Gluster 3.7.11
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