#ceph IRC Log

Index

IRC Log for 2013-12-18

Timestamps are in GMT/BST.

[0:00] * zidarsk81 (~zidar@84-255-203-33.static.t-2.net) has joined #ceph
[0:01] * sarob (~sarob@a689d465.test.dnsbl.oftc.net) Quit (Read error: Connection reset by peer)
[0:04] * zidarsk81 (~zidar@84-255-203-33.static.t-2.net) has left #ceph
[0:05] * joao|lap (~JL@a95-92-37-244.cpe.netcabo.pt) Quit (Ping timeout: 480 seconds)
[0:06] * ScOut3R (~scout3r@4E5C7421.dsl.pool.telekom.hu) Quit ()
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[0:26] * i_m (~ivan.miro@nat-5-carp.hcn-strela.ru) has joined #ceph
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[0:31] * dxd828 (~dxd828@88-105-208-194.dynamic.dsl.as9105.com) Quit (Quit: Computer has gone to sleep.)
[0:31] * xmltok_ (~xmltok@216.103.134.250) Quit ()
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[0:32] * dxd828 (~dxd828@88-105-208-194.dynamic.dsl.as9105.com) has joined #ceph
[0:40] * mschiff (~mschiff@85.182.236.82) Quit (Quit: http://quassel-irc.org - Chat comfortably. Anywhere.)
[0:42] * markl (~mark@tpsit.com) Quit (Ping timeout: 480 seconds)
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[0:45] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
[0:48] * scuttlemonkey (~scuttlemo@c-69-244-181-5.hsd1.mi.comcast.net) has joined #ceph
[0:48] * ChanServ sets mode +o scuttlemonkey
[0:51] * PerlStalker (~PerlStalk@2620:d3:8000:192::70) Quit (Quit: ...)
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[1:01] * jcsp (~jcsp@0001bf3a.user.oftc.net) Quit (Ping timeout: 480 seconds)
[1:02] * mattbenjamin (~matt@aa2.linuxbox.com) Quit (Quit: Leaving.)
[1:02] * lofejndif (~lsqavnbok@82JAAAFUV.tor-irc.dnsbl.oftc.net) Quit (Quit: gone)
[1:08] * sarob (~sarob@2601:9:7080:13a:b909:96cd:2191:dc50) has joined #ceph
[1:08] * dxd828 (~dxd828@88-105-208-194.dynamic.dsl.as9105.com) Quit (Quit: Textual IRC Client: www.textualapp.com)
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[1:16] * sarob (~sarob@2601:9:7080:13a:b909:96cd:2191:dc50) Quit (Ping timeout: 480 seconds)
[1:25] * kbader1 (~Adium@2607:f298:a:607:3001:96dd:225:19b) Quit (Quit: Leaving.)
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[1:37] * dmsimard (~Adium@69-165-206-93.cable.teksavvy.com) has joined #ceph
[1:42] * jcsp (~jcsp@0001bf3a.user.oftc.net) Quit (Quit: Leaving.)
[1:45] * zerick (~eocrospom@190.187.21.53) Quit (Remote host closed the connection)
[1:46] * LeaChim (~LeaChim@host81-159-251-38.range81-159.btcentralplus.com) Quit (Ping timeout: 480 seconds)
[1:46] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
[1:48] * JC (~JC@nat-dip5.cfw-a-gci.corp.yahoo.com) Quit (Quit: Leaving.)
[1:50] * xmltok (~xmltok@cpe-23-240-222-226.socal.res.rr.com) Quit (Quit: Leaving...)
[1:53] * mattbenjamin (~matt@76-206-42-105.lightspeed.livnmi.sbcglobal.net) has joined #ceph
[1:54] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) Quit (Ping timeout: 480 seconds)
[1:55] * dmsimard (~Adium@69-165-206-93.cable.teksavvy.com) Quit (Quit: Leaving.)
[1:55] * kbader (~Adium@38.122.20.226) Quit (Read error: Connection reset by peer)
[1:56] * kbader (~Adium@38.122.20.226) has joined #ceph
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[1:56] * kbader (~Adium@38.122.20.226) Quit (Read error: Connection reset by peer)
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[2:17] * Siva (~sivat@117.192.48.159) Quit (Quit: Siva)
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[2:19] * yanzheng (~zhyan@jfdmzpr04-ext.jf.intel.com) has joined #ceph
[2:25] * xarses (~andreww@64-79-127-122.static.wiline.com) Quit (Ping timeout: 480 seconds)
[2:26] * joao|lap (~JL@a79-168-11-205.cpe.netcabo.pt) has joined #ceph
[2:26] * ChanServ sets mode +o joao|lap
[2:31] * alram_ (~alram@38.122.20.226) Quit (Ping timeout: 480 seconds)
[2:32] * xmltok_ (~xmltok@216.103.134.250) Quit (Quit: Leaving...)
[2:32] * jcsp (~jcsp@0001bf3a.user.oftc.net) Quit (Quit: Leaving.)
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[2:33] * ScOut3R (~ScOut3R@78.92.116.33) Quit (Ping timeout: 480 seconds)
[2:35] * jcsp (~jcsp@0001bf3a.user.oftc.net) Quit (Read error: Connection reset by peer)
[2:38] * i_m (~ivan.miro@nat-5-carp.hcn-strela.ru) Quit (Ping timeout: 480 seconds)
[2:40] * angdraug (~angdraug@64-79-127-122.static.wiline.com) Quit (Quit: Leaving)
[2:41] * sagelap (~sage@2600:1012:b007:e1de:886e:7a0f:1ca1:a39e) has joined #ceph
[2:46] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
[2:51] * jcsp (~jcsp@0001bf3a.user.oftc.net) has joined #ceph
[2:54] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) Quit (Ping timeout: 480 seconds)
[2:54] * dpippenger (~riven@66-192-9-78.static.twtelecom.net) Quit (Quit: Leaving.)
[3:00] * kbader (~Adium@2607:f298:a:607:6d21:7a00:4f5d:831d) has joined #ceph
[3:00] * kbader1 (~Adium@38.122.20.226) Quit (Read error: Connection reset by peer)
[3:00] * jcsp (~jcsp@0001bf3a.user.oftc.net) Quit (Ping timeout: 480 seconds)
[3:03] * Pedras1 (~Adium@c-67-188-26-20.hsd1.ca.comcast.net) has joined #ceph
[3:03] * Pedras (~Adium@c-67-188-26-20.hsd1.ca.comcast.net) Quit (Read error: Connection reset by peer)
[3:14] * Pedras1 (~Adium@c-67-188-26-20.hsd1.ca.comcast.net) Quit (Quit: Leaving.)
[3:15] * alram (~alram@cpe-76-167-50-51.socal.res.rr.com) has joined #ceph
[3:27] * mozg (~andrei@86.184.120.168) Quit (Ping timeout: 480 seconds)
[3:33] * aliguori (~anthony@74.202.210.82) Quit (Remote host closed the connection)
[3:46] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
[3:52] * Siva (~sivat@117.192.48.159) has joined #ceph
[3:54] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) Quit (Ping timeout: 480 seconds)
[3:54] * Siva_ (~sivat@vpnnat.eglbp.corp.yahoo.com) has joined #ceph
[4:00] * Siva (~sivat@117.192.48.159) Quit (Ping timeout: 480 seconds)
[4:00] * Siva_ is now known as Siva
[4:09] * KevinPerks (~Adium@cpe-066-026-252-218.triad.res.rr.com) Quit (Quit: Leaving.)
[4:20] * shang (~ShangWu@175.41.48.77) has joined #ceph
[4:20] <harryp> anyone seen pure storage
[4:22] <harryp> it seems like its ceph on flash
[4:33] * kbader__ (~Adium@2607:f298:a:607:6d21:7a00:4f5d:831d) has joined #ceph
[4:39] * KevinPerks (~Adium@cpe-066-026-252-218.triad.res.rr.com) has joined #ceph
[4:43] * kbader__ (~Adium@2607:f298:a:607:6d21:7a00:4f5d:831d) Quit (Quit: Leaving.)
[4:47] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
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[4:49] * KevinPerks (~Adium@cpe-066-026-252-218.triad.res.rr.com) Quit (Ping timeout: 480 seconds)
[4:50] * kbader (~Adium@2607:f298:a:607:6d21:7a00:4f5d:831d) Quit (Ping timeout: 480 seconds)
[4:55] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) Quit (Ping timeout: 480 seconds)
[4:58] * xmltok (~xmltok@cpe-23-240-222-226.socal.res.rr.com) has joined #ceph
[5:02] * xmltok (~xmltok@cpe-23-240-222-226.socal.res.rr.com) Quit ()
[5:05] * fireD (~fireD@93-142-235-66.adsl.net.t-com.hr) has joined #ceph
[5:07] * fireD_ (~fireD@93-136-86-237.adsl.net.t-com.hr) Quit (Ping timeout: 480 seconds)
[5:11] * dpippenger (~riven@cpe-76-166-208-83.socal.res.rr.com) has joined #ceph
[5:18] * clayb (~kvirc@proxy-ny2.bloomberg.com) Quit (Read error: Connection reset by peer)
[5:30] * kbader__ (~Adium@38.122.20.226) Quit (Quit: Leaving.)
[5:36] * Siva (~sivat@vpnnat.eglbp.corp.yahoo.com) Quit (Ping timeout: 480 seconds)
[5:38] * Vacum (~vovo@i59F792C2.versanet.de) has joined #ceph
[5:45] * Vacum_ (~vovo@i59F7A7BF.versanet.de) Quit (Ping timeout: 480 seconds)
[5:46] * JC (~JC@71-94-44-243.static.trlk.ca.charter.com) has joined #ceph
[5:47] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
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[6:07] * sagelap1 (~sage@cpe-23-242-158-79.socal.res.rr.com) has joined #ceph
[6:09] * haomaiwang (~haomaiwan@112.193.128.119) Quit (Remote host closed the connection)
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[6:14] * sagelap (~sage@2600:1012:b007:e1de:886e:7a0f:1ca1:a39e) Quit (Ping timeout: 480 seconds)
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[6:16] * sherry (~ssha@en-279303.engad.foe.auckland.ac.nz) Quit (Remote host closed the connection)
[6:18] * haomaiwang (~haomaiwan@112.193.128.119) Quit (Ping timeout: 480 seconds)
[6:19] * lx0 (~aoliva@lxo.user.oftc.net) Quit (Remote host closed the connection)
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[6:25] * alram (~alram@cpe-76-167-50-51.socal.res.rr.com) Quit (Quit: leaving)
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[6:28] * JC (~JC@71-94-44-243.static.trlk.ca.charter.com) has joined #ceph
[6:41] * xarses (~andreww@c-24-23-183-44.hsd1.ca.comcast.net) has joined #ceph
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[6:57] * mtanski (~mtanski@cpe-74-65-252-48.nyc.res.rr.com) has joined #ceph
[6:57] * mtanski (~mtanski@cpe-74-65-252-48.nyc.res.rr.com) Quit ()
[7:00] * kbader__ (~Adium@pool-72-67-192-30.lsanca.fios.verizon.net) has joined #ceph
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[7:15] * JC (~JC@71-94-44-243.static.trlk.ca.charter.com) Quit (Quit: Leaving.)
[7:18] * sleinen (~Adium@77-58-245-10.dclient.hispeed.ch) has joined #ceph
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[7:29] * wschulze (~wschulze@cpe-72-229-37-201.nyc.res.rr.com) Quit (Quit: Leaving.)
[7:39] * sarob (~sarob@2601:9:7080:13a:28d0:a3e6:d3cc:2d74) has joined #ceph
[7:43] * rturk-away is now known as rturk
[7:44] * rturk is now known as rturk-away
[7:51] * MK_FG (~MK_FG@00018720.user.oftc.net) has joined #ceph
[8:10] * hjjg (~hg@p3EE31FFC.dip0.t-ipconnect.de) has joined #ceph
[8:21] * DarkAceZ (~BillyMays@50-32-55-181.drr01.hrbg.pa.frontiernet.net) Quit (Ping timeout: 480 seconds)
[8:40] * sarob (~sarob@2601:9:7080:13a:28d0:a3e6:d3cc:2d74) Quit (Remote host closed the connection)
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[9:22] * Hakisho (~Hakisho@0001be3c.user.oftc.net) has joined #ceph
[9:24] * Cube (~Cube@66-87-64-93.pools.spcsdns.net) Quit (Quit: Leaving.)
[9:36] * hybrid512 (~walid@LPoitiers-156-86-25-85.w193-248.abo.wanadoo.fr) Quit (Ping timeout: 480 seconds)
[9:38] * mancdaz_away is now known as mancdaz
[9:41] * ScOut3R (~ScOut3R@212.96.46.212) has joined #ceph
[9:47] * hybrid512 (~walid@LPoitiers-156-86-25-85.w193-248.abo.wanadoo.fr) has joined #ceph
[9:48] * ScOut3R_ (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) has joined #ceph
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[9:50] * ScOut3R__ (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) has joined #ceph
[9:50] <hemantb> hello guys, I am a newbie in ceph with basic understanding and config idea, the thing I wanted to know is how best to use ceph and how are people using it to give it to clients, is it S3API/CephFS/BlockStorage? and what are the pros and cons for the same, if someone can elaborate that would be awesome
[9:50] * ScOut3R (~ScOut3R@212.96.46.212) Quit (Ping timeout: 480 seconds)
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[9:58] * LnxBil (~LnxBil@p5099afb6.dip0.t-ipconnect.de) Quit (Quit: leaving)
[9:58] * lightspeed (~lightspee@pool-71-178-139-135.washdc.east.verizon.net) Quit (Ping timeout: 480 seconds)
[9:59] * ScOut3R__ (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) Quit (Ping timeout: 480 seconds)
[10:00] * ScOut3R__ (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) has joined #ceph
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[10:09] * ScOut3R__ (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) Quit (Ping timeout: 480 seconds)
[10:11] * ScOut3R (~ScOut3R@catv-80-99-64-8.catv.broadband.hu) Quit (Ping timeout: 480 seconds)
[10:13] * sarob (~sarob@2601:9:7080:13a:5cca:18f1:e023:b818) has joined #ceph
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[10:14] * yanzheng (~zhyan@jfdmzpr04-ext.jf.intel.com) Quit (Quit: Leaving)
[10:21] * sarob (~sarob@2601:9:7080:13a:5cca:18f1:e023:b818) Quit (Ping timeout: 480 seconds)
[10:24] * LeaChim (~LeaChim@host81-159-251-38.range81-159.btcentralplus.com) has joined #ceph
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[10:39] * i_m (~ivan.miro@nat-5-carp.hcn-strela.ru) has joined #ceph
[10:54] * topro (~prousa@host-62-245-142-50.customer.m-online.net) Quit (Quit: Konversation terminated!)
[10:59] * sarob (~sarob@2601:9:7080:13a:ec5b:907b:9c8d:c92e) has joined #ceph
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[11:07] * sarob (~sarob@2601:9:7080:13a:ec5b:907b:9c8d:c92e) Quit (Ping timeout: 480 seconds)
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[11:57] <dock> Hi I've recently switched to ceph cluster solution from a btrfs based solution. Is there an easy way to find out how many unique/not referenced blocks/bytes a block device currently use? If not what is the hard way?
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[12:00] <dock> The reason I need this is that I heavily rely on the rbd layering feature and it is impossible to what I'm doing with out COW, currently the disk usage is growing at an unexpected rate and I have not yet found sufficient tools to analyze it!
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[12:51] <tziOm> mapping of rbd seems to fail here..
[12:51] <tziOm> process just hangs.
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[13:12] <tziOm> seems to be with versioning..
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[13:32] <WintermeW> Hi, do you know if it exists a python binding for the Admin Operations REST API ?
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[13:40] <joao> you mean ceph-rest (or what's its name)?
[13:41] <joao> if so, iirc it heavily relies on the stuff under 'pybind'
[13:41] <joao> you may be able to put something together according to your needs
[13:41] <joao> but afaik there's no python bindings for the rest api
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[13:41] <joao> WintermeW, ^
[13:43] <WintermeW> joao: hi, i mean this : http://ceph.com/docs/master/radosgw/adminops ( this is clearly not hard to use direct API calls via requests, but if the work is already done, then great
[13:43] <joao> ah
[13:43] <joao> sorry, thought you meant something else
[13:44] <joao> no idea then
[13:44] <WintermeW> ok, np..i'll wait here then maybe somebody will have an answer for me ;)
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[13:54] <bwesemann> hi, ceph-osd causes high cpu load, can someone help please?
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[13:55] <bwesemann> 5010 root 20 0 1413m 383m 10m S 93 0.3 2043:40 ceph-osd
[13:56] <andreask> bwesemann: current ceph status? ceph -s
[13:57] <bwesemann> health HEALTH_OK
[13:57] <bwesemann> monmap e1: 3 mons at {pvmon1-ham2=172.16.6.21:6789/0,pvmon2-ham2=172.16.6.22:6789/0,pvmon3-ham2=172.16.6.23:6789/0}, election epoch 12, quorum 0,1,2 pvmon1-ham2,pvmon2-ham2,pvmon3-ham2
[13:57] <bwesemann> osdmap e1431: 9 osds: 9 up, 9 in
[13:57] <bwesemann> pgmap v564853: 1260 pgs: 1260 active+clean; 1120 GB data, 3360 GB used, 5013 GB / 8374 GB avail; 10920KB/s wr, 2087op/s
[13:57] <bwesemann> mdsmap e1: 0/0/1 up
[13:58] <bwesemann> we have bad performance inside vms
[13:59] <bwesemann> on the hosts we see 7.8%wa
[13:59] <bwesemann> replications ist set to 3
[13:59] <bwesemann> is set :)
[14:01] <andreask> ceph -w also silent?
[14:01] <bwesemann> yeah, only performance stats
[14:01] <andreask> and the log of this specific osd?
[14:02] <bwesemann> the load is high on all 9 osds
[14:02] <bwesemann> not only 1
[14:05] <bwesemann> nothing in the logs, debugging not enabled
[14:05] <tnt_> Well you have some traffic obviously 10920KB/s wr, 2087op/s
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[14:05] <dock> I would not consider that much tho
[14:06] <tnt_> is it iowait load ?
[14:06] <andreask> no storage subsystem errors/problems?
[14:08] <bwesemann> @andreask how can we check that?
[14:08] <cephalobot> bwesemann: Error: "andreask" is not a valid command.
[14:08] <bwesemann> tnt_: yes we think so
[14:09] <andreask> bwesemann: common system/kernel logs
[14:09] <bwesemann> dmesg shows nothing
[14:09] <bwesemann> on all nodes
[14:10] <bwesemann> inside vms read perf is only 16mb
[14:10] <andreask> enough memory on osd servers?
[14:10] <bwesemann> Mem: 148538028k total, 147646064k used, 891964k free, 136416k buffers
[14:10] <bwesemann> Swap: 341355516k total, 4394152k used, 336961364k free, 123995128k cached
[14:11] <bwesemann> jep think so
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[14:13] <andreask> iostat -dkx shows no disk bottlenecks?
[14:13] <bwesemann> we have another 6 node cluster with ceph 0.61.9 and only 2 replication. there the load is normal...strange...
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[14:15] <bwesemann> http://pastebin.com/JCdqBvZB
[14:16] <bwesemann> sda is only system
[14:16] <bwesemann> sde is ssd journal
[14:17] <andreask> and 9 osds share on ssd journal?
[14:17] <andreask> journal disk ...
[14:17] <bwesemann> 3 on 1 ssd
[14:18] <bwesemann> http://pastebin.com/VkkCNtNY ceph osd tree
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[14:21] <andreask> you have watched iostat some minutes?
[14:27] <bwesemann> jep, all the values remain
[14:27] <bwesemann> strange
[14:27] <bwesemann> one moment we have an inktank supporter
[14:35] <tnt_> is that with qemu btw ?
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[14:44] <dock> After reading dev docs I realized that what I want to do is to find out how many objects that does not exist in a child yet, without creating them and hopefully without even mapping it. However it seems unlikely that would be doable with the architecture of rbd if it had to be done in the kernel-client. Is it possible to get that sort of information directly from rados?
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[14:49] <bwesemann> yes, qemu kvm
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[14:55] <pmatulis2> dock: not sure what this means: "how many objects that does not exist in a child yet"
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[15:10] <bwesemann> ok, supporter found nothing
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[15:32] <dock> pmatulis2: I use rbd with layering and the clones, children, with cow the children don't copy up the rados objects until they are written. This is relevant to me because I need to know how much unique data data the block device has created.
[15:32] <dock> After playing around in rados I realized I can quite easily just use rados to get all the information I could ever want
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[15:45] <pmatulis2> ah ok, cloning
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[16:10] <mozg> hello guys
[16:10] <mozg> Has anyone used the S3 gateway with cloudstack for providing the Secondary Storage?
[16:10] <mozg> i've got some issues which I was hoping to get help on?
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[16:36] <joelio> Thinking about upgrading the prod. to Dumpling from Cuttlefish.. any blockers/stuff to be aware of/
[16:36] <joelio> er.. Cuttlefish to Dumpling even
[16:37] <janos> not sure. i went from bobtail to dumpling
[16:37] <janos> and the only problem i had was completely of my own making
[16:37] <janos> and fixable
[16:37] <janos> then everything went smoothly
[16:37] <joelio> cool
[16:37] <janos> i've since done dumpling to emperor .02.1
[16:38] <janos> .72.1
[16:38] <janos> with zero problem
[16:38] <joelio> nice
[16:38] <janos> the wiki page on upgrades has done well by me
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[16:41] <tnt_> joelio: my upgrade from Cuttlefish to Dumpling was the smoothest update I ever had.
[16:42] <joelio> tnt_: good to know.. just about to huit my 13 million pgmap and cuttlefish has been stable as hell
[16:43] <joelio> want to ensure we don't fall behind too far though
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[16:59] <zoltan> hey
[16:59] <zoltan> I'm running dumpling in production and just lately our performance went out of the window, and I don't know why... watching ceph -w tells me that sometimes we get 0B/s read which is physically impossible
[17:00] <zoltan> it's going up and then drops, going up, and then drops, etc.
[17:00] <zoltan> rbd bench seems to be fine, however.
[17:00] <zoltan> any ideas?
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[17:02] <pmatulis2> zoltan: pastebin output to 'ceph status' and 'ceph health detail'
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[17:03] <zoltan> http://pastebin.com/e1rBsipv
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[17:10] <zoltan> everything seems to be normal
[17:10] <pmatulis2> zoltan: i would start by provisioning 2 more monitors
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[17:11] <zoltan> yes, I know 3 is the recommended value
[17:12] <zoltan> but it has been running fine with one... I just can't explain the sudden performance drops
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[17:12] <pmatulis2> zoltan: has the workload changed?
[17:13] <zoltan> not in the sense that you mean; we're mainly hosting VMs on it via iSCSI in vmware. I've logged into one of the VMs, and then with dd I see around ~25MB/s with bs=1M; with fio I see a lot more, but what I see even with fio is that it goes up to 300MB/s, then down to around 20, then go up again, then down...
[17:14] <zoltan> I've rechecked the network and I see the 10Gbit between all hosts (two osd hosts and the monitor)
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[17:16] <pmatulis2> zoltan: what about the cpu/ram/io on those 3 hosts?
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[17:16] <zoltan> have plenty available from both
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[17:20] <pmatulis2> zoltan: i would therefore look in the logs for anything conspicuous
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[17:33] <zoltan> well, been there, done that, but nothing I see helps
[17:33] <zoltan> I'll set up 2 additional monitors and we'll see tomorrow
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[17:37] <zoltan> thanks!
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[18:11] <nwf> Hey channel; does cephfs honor fsync() (by default)?
[18:11] <nwf> (Er, the in-kernel cephfs)
[18:12] <sagewk> nwf: of course! :
[18:12] <sagewk> :)
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[18:22] <nwf> sagewk: That's reassuring. We had a very odd failure show up when one of our cephfs clients lost connectivity. After we restarted the server the backing-store was inconsistent.
[18:22] <nwf> sagewk: On the topic, do you know which of the parameters in mount.ceph I want to change so that it retries connecting to the mon and osds indefinitely?
[18:22] <sagewk> if the client is disconnected for too long it needs to be restarted (it will get fenced)
[18:24] <sagewk> mount_timeout=0
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[18:28] <nwf> "fenced"?
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[18:29] <nwf> Our client fell offline for a few minutes, at most, and did, indeed, need to be restarted, even after connectivity was restored. But the application atop cephfs (an AFS file server) screamed bloody murder about corruption in the filesystem and rolled back quite a ways.
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[18:47] <sagewk> nwf: hmm! i don't think that should happen
[18:47] <sagewk> would be great if you can figure out how to reproduce it
[18:47] <nwf> I will try with something that isn't user data. :)
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[18:49] <sagewk> :)
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[21:41] <matthewh> Hi, I'm having some problems with some machines using cephfs. Sometimes when the ceph filesystem is mounted and you try to access the directory it hangs.
[21:41] <matthewh> I'm using the kernel client. Is the fuse client a more stable option?
[21:41] <matthewh> kernel version 3.12
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[21:54] <lxo> matthewh, are client and server on the same host? this sometimes causes this sort of problem with the kernel client; fuse works around that vm deadlock
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[22:01] <matthewh> lxo the client and server are on different hosts. However the client and the server are on xen virtual machines where one of the monitors is on the same physical host as the client but under two different VM's.
[22:02] <matthewh> This problem is showing up in emperor release btw. I'm going to try the fuse client and see if the problem persists.
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[22:20] <matthewh> ok fuse is much better.
[22:20] <matthewh> There are no long pauses
[22:21] <matthewh> I think there must be some problems with the cephfs kernel driver
[22:21] <matthewh> in 3.12
[22:21] <matthewh> How do you set the root directory (i.e. the -r option) from fstab?
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[22:30] <pmatulis2> matthewh: best open a bug
[22:34] <matthewh> pmatulis2 - I'll do that.
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[22:42] <aarontc> Is scuttlemonkey here?
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[22:47] <scuttlemonkey> hey
[22:48] <scuttlemonkey> what can I do for you aarontc?
[22:48] <aarontc> scuttlemonkey: Just wanted to give you a heads up that mailman seems to be confused about the multiple domains for the ceph-community list
[22:48] <scuttlemonkey> orly
[22:49] <scuttlemonkey> hmm
[22:49] <aarontc> scuttlemonkey: I just got a response " Message has implicit destination"
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[22:49] <aarontc> I replied to a thread on the list with "reply all"
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[22:50] <aarontc> (which had community@ceph.com as the list address)
[22:50] <scuttlemonkey> k, thanks
[22:50] <aarontc> no problem
[22:50] <scuttlemonkey> I'll take a look here as soon as I can
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[23:13] <matthewh> Hi, I'm have more problems with cephfs under Emperor. What happens is if you try to access the mount point it freezes
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[23:13] <matthewh> I've tried both the kernel client and now the fuse client and both are doing the same thing
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[23:14] <matthewh> I have two clients accessing it currently, one can be frozen while the other is OK. Ceph is showing HEALTH_OK
[23:15] <matthewh> How do I go about diagnosing these problems?
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[23:16] <AfC> Is there a maximum length that rados object names can be? A circa 2009 blog post said something about 20 bytes, but some basic testing showed that it didn't seem to care much how long the string is.
[23:16] <AfC> Obviously it's hashing under the hood en route to the pg, but what if any rules are there about those strings?
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