Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster, 2015-12-07

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01:09 devinmcelheran How would I mount a glusterfs volume so that if the host I'm naming in the mount goes down, or is down at the time of mount, the volume is (or is still) mounted?
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02:47 Topic for #gluster is now Gluster Community - http://gluster.org | 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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12:51 JVieira Hi guys, i have a quick question... im trying to set up a 2 node HA replication cluster with gluster, and i need iscsi targets and therefore luns, my question is fairly simple does the lun file gets replication in "real-time" by the gluster?
12:52 JVieira as the lun file is being "used" how does gluster handle the "replication" between the nodes?
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13:37 JVieira how can i provide iscsi target from the glusterfs to a windows initiator? Should it be a file based or can i mount the whole volume?
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14:22 zoldar Hi. I'm experiencing a weird situation where one of the nodes sees one of its' peers as disconnected while all other nodes see all peers connected. Here's the output: http://dpaste.com/28N1N5J . Any ideas?
14:22 glusterbot Title: dpaste: 28N1N5J (at dpaste.com)
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16:25 zoldar oops
16:25 Jmainguy gottem
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19:58 xoritor hello again
19:59 xoritor i have a question about dispersed volumes
20:00 xoritor i am _ASS-u-ME-ing_ that if i set up a dispersed volume 5x2 (you can do that correct?) that it would not keep the files whole but in parts (ie... stripe the files)
20:00 xoritor i have not tried it
20:01 xoritor 5 bricks with a redundancy of 2
20:01 xoritor i am trying to avoid splitting my drive in 1/2 again ... it works but i just dont like doing it
20:03 xoritor i just dont get what "dispersed" really does very well
20:03 * xoritor is kinda dense sometimes
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20:09 Jmainguy xoritor: it keeps files whole
20:09 Jmainguy 5x1 is distributed, if you had 5 files, one file ber brick
20:10 Jmainguy 5x2 is distributed-replicated
20:10 xoritor ok... but that is distributed not dispersed
20:10 Jmainguy hmmmm
20:10 xoritor im familiar with most of it
20:10 Jmainguy whats dispersed
20:10 xoritor what i dont get is dispersed
20:10 xoritor and you cant do 5 bricks in distributed
20:11 xoritor it wont let you... not distrepl anyway
20:11 Jmainguy yeah not distrepl
20:11 Jmainguy that was a bad example
20:11 xoritor hehe
20:11 Jmainguy I guess disperse works like you say
20:11 Jmainguy parts of blocks, not whole
20:11 Jmainguy seems dangerous
20:11 xoritor yea thats what i was afraid of
20:11 xoritor yea
20:12 Jmainguy https://www.gluster.org/community/docu​mentation/index.php/Features/disperse
20:12 xoritor scares the poo out of me
20:12 Jmainguy in the redhat gluster class
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20:12 Jmainguy we only went over distrib, and distrib-replicated
20:12 xoritor i use distrpl
20:12 Jmainguy yup
20:12 Jmainguy thats basically what the class recommended
20:13 Jmainguy and mess with geo-replication for fun
20:13 Jmainguy but dist-repl seems the way to go
20:13 xoritor but i have 5 nodes and 1 drive per node so i have to split the drive into 2 bricks to get 10
20:13 xoritor ie... 2 partitions
20:13 xoritor sucks
20:14 xoritor i want distrepl of 5x2... but i cant have it
20:14 xoritor ;-)
20:14 xoritor i used to teach that class
20:14 xoritor hahaha
20:15 xoritor but that was before disperse
20:15 Jmainguy xoritor: lol nice
20:18 xoritor the reason i dont want to split the drive is that when using rdma i can easily use the full bandwidth to the drive
20:18 xoritor so if i spilt the drive and use 2 bricks to each drive i only get about 1/2 the bandwidth as i have to share the physical link
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20:20 xoritor so it looks like my options are distributed to keep whole files or dispersed and just deal with parity bits of files
20:21 xoritor that or find another solution
20:21 xoritor ceph runs like crap on my hardware
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21:04 JoeJulian xoritor: split the drive. You'll still get the full bandwidth unless you're replicating to the same server, and that would be silly.
21:05 JoeJulian xoritor: And if you have multiple clients accessing the files on the same server, it doesn't matter if those files are in different partitions or the same partition, they'll still be doing the same bandwidth sharing.
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21:17 xoritor JoeJulian, yea i was just looking at that... i have data on one partition and not the other
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21:17 xoritor so i guess it is smart enough to figure out
21:17 xoritor anway... smarter than me
21:17 xoritor JoeJulian, you still using arch?
21:18 xoritor JoeJulian, you know if arch has support for rdma?
21:18 xoritor well... glusterfs on arch
21:18 JoeJulian I am using arch, and yes. the glusterfs arch package is actively maintained.
21:19 xoritor yea i see that, and have seen it for some time... but the ib stuff is still in AUR
21:19 xoritor its not in the main repos
21:19 JoeJulian Ah, we use 10G ethernet so I've not followed ib.
21:19 xoritor so i am not sure if glusterfs would support rdma or not
21:20 xoritor right... most people dont do rdma i guess
21:20 xoritor even though it looks like rdma is comeing ethernet too
21:21 JoeJulian Good point about the ib stuff being in aur. I see that the rdma library for gluster is not built in the mainline package.
21:21 xoritor roce is starting to show up on quite a few 10G and 40G cards
21:21 xoritor right... thats what i was afraid of
21:21 JoeJulian I like ib, I just don't have any of those toys.
21:22 xoritor i love arch, just dont have time to maintain the ib stuff
21:22 xoritor heh
21:22 xoritor its cheap if you get it on ebay
21:22 xoritor ;-)
21:22 JoeJulian I've thought about doing that here at home.
21:23 xoritor i found some cx-3 cards for about $40 each
21:23 xoritor the vpi dual port ones
21:23 xoritor they do 10Gbit ethernet or ib
21:23 JoeJulian But I purposfully choose low-power over performance so it wouldn't do any good considering I'm using green disks.
21:23 xoritor for $40 or less you cant beat it for a 10Gbit card
21:23 xoritor heh
21:24 xoritor right... i have considered the same
21:25 xoritor i guess i can use debian in a container for rdma support
21:25 JoeJulian Also, vote for the aur package
21:26 JoeJulian Maybe we can get some more votes and it can get mainlined.
21:26 xoritor i think i di
21:26 xoritor d
21:26 xoritor not sure
21:26 xoritor i will if i have not
21:29 xoritor i have done this before and it works like a champ
21:30 xoritor but it would be nice to have it all on arch or something not debain based
21:30 xoritor i shouldnt say that
21:31 xoritor i would rather use the same "base" container i am using for other things... arch or alpine
21:31 JoeJulian It's not hard to just mirror the aur package and have a cron job build it and dump it into your own internal repo.
21:31 xoritor yea i know
21:32 xoritor i just dont want to have a critical piece of infrastructure depending on an AUR package that could die at any moment...
21:32 xoritor i may do that sometime in the future if i setup some sort of infrastructure to test it
21:33 xoritor its all in containers anyway
21:43 xoritor is it ok if they are close but not EXACT in size?
21:44 xoritor ie... 477.0 GiB and 476.9 GiB
21:44 JoeJulian It's fine with me
21:44 xoritor glusterfs wont freak though right?
21:44 JoeJulian You're not going to let them get more than 90% full anyway, right?
21:44 xoritor i spent more time last time
21:44 xoritor nope
21:44 JoeJulian no problem
21:45 xoritor yea i didnt think so
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21:45 xoritor i just dont feel like cacluating the bits to get it exact
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22:27 xoritor debian sucks
22:28 xoritor ok... any reason a volume would fail to start even using tcp with "transport not available"
22:33 xoritor never mind
22:34 xoritor it worked that time
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22:49 xoritor well it works with tcp... but not rdma and for that i can use the arch image and keep it smaller
22:49 xoritor s/image/container/
22:50 glusterbot What xoritor meant to say was: well it works with tcp... but not rdma and for that i can use the arch container and keep it smaller
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22:55 xoritor technically the container is "bigger" for now
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