Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2017-05-18

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All times shown according to UTC.

Time Nick Message
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00:49 BlackoutWNCT Hey Guys, anyone know if there's a way to exclude a file from being included in a rebalance?
00:49 BlackoutWNCT I've got an ISCSI target image here which is currently locked due to rebalance.
00:50 BlackoutWNCT So I've got 2 questions really...
00:50 BlackoutWNCT Is there a way to stop it from rebelancing this file so that I can access it again?
00:50 BlackoutWNCT And is there a way to prevent it from reblancing this file in future so that I don't have to go through this again?
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01:49 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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08:50 decent_gradient Good Morning!
08:50 decent_gradient I have a question regarding the ACL/permissions. I have set up my gluster storage, and mounted it on a laptop. However, even when I create a file as another user, I can always remove it using sudo on my laptop. Did I make a configuration error, or is that behaviour expected?
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08:54 jiffin decent_gradient: sudo mean an equivalent power as root right, so I guess using sudo other users may able delete the file
08:55 jiffin I guess it is an expected behavior for posix
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08:59 decent_gradient jiffin: On the one hand, that makes sense from the POSIX ACLs. On the other hand, that essentially means that, if you allow users to access the storage with their own computers, there cannot be any effective access restriction.
09:01 rastar decent_gradient: what you need is server.root-squash
09:02 rastar server.root-squashPrevents root users from having root privileges, and instead assigns them the privileges of nfsnobody. This squashes the power of the root users, preventing unauthorized modification of files on the Red Hat Gluster Storage Servers.
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09:03 rastar jiffin: ^^^
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09:08 decent_gradient rastar: That's perfect! Thank you very much
09:09 decent_gradient Do you also happen to know whether you can add "trusted clients" able to use root access despite that option for maintenance purposes, for example?
09:11 rastar decent_gradient: we do have that option. Trying to recall. I think it is a fuse mount option
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09:16 rastar decent_gradient: while doing a fuse mount, use --no-root-squash. If a trusted client provides this option then server won't perform root-squash for ops from there.
09:16 rastar decent_gradient: has no effect when the option is used by a client outside the trusted storage pool.
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09:30 decent_gradient rastar: Thank you, that's awesome.
09:30 decent_gradient I wouldn't have found that myself :-)
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09:55 decent_gradient rastar: Works perfectly. Thanks again
09:55 rastar decent_gradient: awesome, happy to help :)
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13:43 Ulrar Hi, we have a BIG problem on a replica 3 cluster, two node died
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13:44 Ulrar Can I tell gluster that it's quorum is 1, at least to get minimum service back ?
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14:05 weller cheers. I am using gluster 3.10.1 with CentOS7, and I am experiencing surprisingly low performance on a fresh 2-node cluster with a 2 brick replicated volume. are there hints how to speed up performance?
14:06 weller the nodes are connected by 1gbit, with 2 interfaces each, in different subnets
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15:38 PatNarciso wellr00t - how is performance low?
15:40 PatNarciso all, non-gluster related: I'm reading for the first time that odd raid5/6 disk counts (15 vs 16) produce poor performance than even number disks.    I've heard of with with abnormal zraids, but never md raids.  I figured I'd mention it in here, incase someone would say "ohh yeah, odd sizes suck"  or "its never been a problem for me".
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15:42 JoeJulian PatNarciso: I've not seen a difference. We had 15 disk arrays (14+1 spare) which we changed to 13+2 and performance didn't change at all.
15:42 JoeJulian That was mdadm
15:42 PatNarciso Just the feedback I needed.
15:42 PatNarciso Thank you.
15:43 PatNarciso ... what kind of stripe size did you use on that array?
15:43 JoeJulian iirc, it was default.
15:44 PatNarciso often the best.
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16:12 major PatNarciso, the closest thing that crops up in my head is an issue with ext2/3/4 in which the filesystem needs to be informed of you chunk size so that all your group descriptor tables do not end up on a single platter
16:14 PatNarciso major, right on.  thank you.
16:14 major they eventually "stripe_width=<width>" and "stride=<stride-size>" options to mke2fs -E
16:14 major used to be we had to calculate it all by hand
16:14 major s/\(eventually\)/\1 added/
16:16 PatNarciso *nods*
16:24 Klas Ulrar: default you don't need quorum
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16:42 JoeJulian Thanks, Klas, for answering him. I noticed he got it handled on the mailing list earlier.
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