#ceph IRC Log

Index

IRC Log for 2013-07-20

Timestamps are in GMT/BST.

[0:01] * yanzheng (~zhyan@101.83.60.227) has joined #ceph
[0:08] <jakes> ceph pg dump_stuck stale gives all pg's as stale but ceph pg query says , i dont have pgid
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[0:12] <sagewk> stale means the last osd(s) who had the pg are down
[0:12] <sagewk> so that is not unexpected. probably too many of your osds are not running
[0:13] <dmick> jakes: could be the format of your ceph pg <pgid> query command
[0:14] <dmick> jakes: ceph osd tree will confirm all your osds are up and in the right place in the crush map
[0:15] <jakes> all osd's are up. ceph -w gives log "2013-07-19 15:15:04.906459 osd.0 [WRN] slow request 78067.600226 seconds old, received at 2013-07-18 17:33:57.305933: osd_op(mds.0.8:4 mds_snaptable [read 0~0] 1.d90270ad RETRY=1 e45) v4 currently waiting for pg to exist locally"
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[0:16] <jakes> I have tried ceph pg 0.5 query
[0:16] <dmick> and the response?
[0:17] <jakes> i don't have pgid 0.5
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[0:18] <dmick> jakes: can you pastebin ceph pg dump output
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[0:27] <jakes> dmick: http://pastebin.com/AUcxJAC5
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[0:45] <jakes> ceph -w dump http://pastebin.com/ihcF6sqC
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[0:58] <sjust> sagewk: wip-5672
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[1:03] <sagewk> sjust: + cont = cont && dstate->resume_clearing();
[1:03] <sagewk> missing == there?
[1:03] <sagewk> er, nm
[1:03] <sjust> I don't think so, cont is continue
[1:03] <sjust> except that continue is reserved :(
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[1:09] <sagewk> what do we gain by setting PAUSED while we wait?
[1:09] <sjust> it's cancelable in that state
[1:09] <sagewk> afaics nothing looks at that?
[1:10] <sjust> the change to try_stop_deletion will complete without blocking while it is in that state
[1:10] <sjust> and will return success
[1:10] <sagewk> oh i see
[1:10] <sjust> so we only block while we are about to submit a transaction
[1:10] <sjust> not while it actually completes
[1:11] <sjust> the ordering is the important part, the pgs have flushing they have to do anyway
[1:11] <sagewk> would it make more sense to rename PAUSED to WAITING?
[1:11] <sjust> yep
[1:12] <sjust> repushed
[1:12] <sjust> I'm going to run it through a bit of teuthology before merging
[1:12] <sagewk> i'd change the cont && ... to regular if (cont) ...
[1:13] <sjust> ok
[1:14] <sjust> repushed
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[1:42] <sagewk> gregaf: it's the aptly-named wip-swift
[1:46] <gregaf> is this what was making the swift tests fail?
[1:46] <gregaf> (why didn't anything else notice?)
[1:48] <gregaf> sagewk: ^
[1:48] <sagewk> yeah
[1:49] <sagewk> not many things (besides pool creation) block on a osdmap subscription wait-for-next-map
[1:49] <gregaf> was it timing out and going to a different monitor eventually or something?
[1:50] <sagewk> nope, the mon heartbeat was alive and well
[1:50] <sagewk> not sure what eventaully timed out..something in teuthology. didn't look at the rest of the run
[1:50] <gregaf> surely we do pool creates in other tests
[1:50] <sagewk> it doesn't hit it every time
[1:50] <sagewk> and it does lots of pools in a row
[1:50] <gregaf> right, only when you send it to a peon, but I thought we didn't see it anywhere else and always saw it on the swift tests
[1:50] <sagewk> is a bit surprising, tho
[1:51] <sagewk> oh, swift upstream pip stuff is also broken
[1:51] <sagewk> i think yehuda just hit this while debugging that
[1:54] <gregaf> let's see, so we're looking at the in-memory osdmap and the on-disk incrementals up to the version we have in memory even if we're not readable
[1:54] <gregaf> obviously there isn't a memory race issue due to global mon lock so that should be fine, and we'll update the memory version after the disk versions so that should be fine...
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[1:55] <sagewk> i looked at all teh sent_latset() callers and they all seem to be happy with something newer than what they had
[1:57] <sagewk> still need to run this through the test suite
[1:57] <sagewk> i like removing loc tho
[1:58] <gregaf> yes
[1:58] <gregaf> what I'm concerned about is if we have anything that's asking for a map one newer than current in order to make sure it contains a change it just asked or
[1:58] <gregaf> *asked for
[1:59] <gregaf> but I'm not seeing anything like that, so this gets my Reviewed-by assuming it passes a suite run
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[1:59] <sagewk> those mostly go through C_ReplyMap (waits for proposal), or check_subs() (which is what broke here)
[2:00] <gregaf> yeah, just wanted to make sure there wasn't a misbehaving caller or some way that osds could leak that in
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[2:04] <sagewk> gregaf1: one more patch on top when you're between beers
[2:04] <sagewk> (+ a doc update that will give you a warm and fuzzy)
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[2:13] <gregaf1> *feels warm and fuzzy*
[2:15] <gregaf1> sagewk: yeah, the take_all_waiters change and discard looks good too
[2:16] <sagewk> k
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[2:23] <grepory1> hrm i wish mark were here so i could get his fio configs
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[2:25] <gregaf1> you mean nhm?
[2:30] <grepory> yes. i probably am forgetting what his name is
[2:30] <grepory> but i keep thinking it's mark nelson
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[2:31] <dmick> yep
[2:33] <grepory> cool
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[7:12] <jason> hi
[7:12] <jason> Li Wang Profeesor,where are you?
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[7:16] <huangjun> from china?
[7:16] <huangjun> which university?
[7:20] <wiwengweng> hey
[7:22] <wiwengweng> I check the log when using curl to list the bucket. it did show the buckets in the log, but not show up actually. log shows CORS is not set. is that the root cause?
[7:24] <huangjun> CORS?
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[7:24] <wiwengweng> yes, but I don't know that
[7:25] <wiwengweng> There is no content for CORS xattr, cors may not be set yet
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[7:26] <jjgalvez> Cross-Origin Resource Sharing, Amazon S3 posted information on what it is when it was new to their service: http://aws.amazon.com/about-aws/whats-new/2012/08/31/amazon-s3-announces-cross-origin-resource-sharing-CORS-support/
[7:27] <jjgalvez> and that's part of cuttlefish, as of 0.60
[7:27] <jjgalvez> sorry, 0.61*
[7:27] <janos> gimpy hacks for browsers ;(
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[7:31] <huangjun> if i use ceph to deploy only 2 hosts, the client write rate about 40MB/s,that a normal rate?or should we get the cluster much bigger?
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[15:20] <Kioob> Hi
[15:21] <Kioob> I have the bug #4703 when upgrading from 0.61.4 to 0.61.5
[15:22] <Kioob> I have just restart one MON in 0.61.5, and logs are filled by � cephx: verify_reply coudln't decrypt with error: error decoding block for decryption �
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[15:26] <Kioob> I try to restart again that MON, I still have the same error
[15:28] <Kioob> I have upgraded an other one, and I obtain the same problem
[15:28] <Kioob> Since I now have 2 dead MON on 5, I stop here :D
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[15:39] <huangjun> kioob:what about the log output?
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[16:13] <Kioob> huangjun: well it's the output of log
[16:13] <Kioob> a lot of cephx: verify_reply coudln't decrypt with error: error decoding block for decryption
[16:14] <Kioob> http://pastebin.com/0Cmn7UUQ
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[16:36] <jksM> sounds similar to when upgrading from bobtail to cuttlefish... you just had to upgrade enough to form a new quorum there... I don't know if the same applies here
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[16:39] <Kioob> jksM: you're right, it's indicated in full release notes :
[16:39] <Kioob> « This release fixes a 32-bit vs 64-bit arithmetic bug with the feature bits. An unfortunate consequence of the fix is that 0.61.4 (or earlier) ceph-mon daemons can’t form a quorum with 0.61.5 (or later) monitors. To avoid the possibility of service disruption, we recommend you upgrade all monitors at once. »
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[16:53] <huangjun> uhh,there are few pepole report this, seems multi-mon is not stable, and you said use 5 mons, but ceph recommend 3 mons at most.
[16:55] <DaChun_> "ceph recommend 3 mons at most"? Could you please show me the reference link?
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[16:59] <Kioob> ceph recommend 3 mons at *least*, no ?
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[17:18] <Kioob> huangjun: http://ceph.com/w/index.php?title=Designing_a_cluster#Ceph_Monitor_.28Ceph-MON.29
[17:19] <DaChun_> Per my understand about Paxos, 3 is the smallest size for redundancy. The more mons, the more redundancy. Meanwhile the stability depends on specific implementations. I don't know how good the mon's scalability is.
[17:20] <Kioob> Yep, for me MON are not �lightweight� daemon, since they are really IO dependents
[17:20] <Kioob> but it's another problem
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[19:49] <s2r2> hi #ceph. this commit, https://github.com/jgalvez/barclamp-ceph/tree/692db716143b54e41e78f56798704890e7048160, mentions that the ceph barclamp is being updated for cuttlefish -- What's the status of this process?
[19:51] <s2r2> the script here, https://github.com/ceph/package-ceph-barclamp/blob/master/package-ceph.sh, will just download the latest packages, right? is it going to just work? :)
[19:52] <s2r2> ("You may need to restart your crowbar-webserver at this point" oops this might explain a lot.)
[19:56] <s2r2> Indeed, the restart is essential if the barclamp wasn't installed before.
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[20:20] <yehuda_hm> paravoid: around?
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[20:21] <yehuda_hm> paravoid: I pushed a fix to that ACLs issues yesterday to wip-5691
[20:31] <Kioob> Ceph on *good* SSD like Intel S3500 rocks. I'm happy :p
[20:32] <Kioob> (I have just replaced 320 series per this model...)
[20:33] <Kioob> next step : remove the X25-M models, which are used on some OSD for journaling...
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