[Bug 1016435] Re: remove btrfs recommendation

[Christian Parpart]

can at least one of all of you, saying "crashed badly", tell me what you
exactly mean? I am looking into using Btrfs for data storage and ideally
with Ceph, and I'd like to know what you mean by just the word "crash"
and how current this state is :-)

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Title:
  remove btrfs recommendation

Status in “ceph” package in Ubuntu:
  Confirmed

Bug description:
  remove recommending btrfs

  Upstream doesn't recommend it for production use. Btrfs is unstable
  and does result in many warnings displayed specifically with CEPH's
  workload. Performance degrades over time, under ceph's workload. (see
  mailing list & cross posts from ceps to btrfs).

  14:32 <xnox> On top of which filesystem is it currently recommended to run CEPH? btrfs?!
  14:32 <pmjdebruijn> last time we tried btrfs still had issue
  14:33 <pmjdebruijn> we are running it on ext4
  14:33 <pmjdebruijn> already we have a limited usecase
  14:33 <pmjdebruijn> although* (not already)
  14:33 <pmjdebruijn> xnox: stick around and see what others have to say
  14:33 <filoo_absynth>  /sign
  14:33  * xnox will be idle here for a bit ;-)
  14:34 <filoo_absynth> tried btrfs, crashed badly. used ext4, crashed badly too, but it wasn't the FS's fault
  14:45 <ao> ext4 without journal just got a bug fixed in 3.2.18 that can hang osd. We are just now retrying with 3.2.18.
  14:48 <ao> btrfs also crashed here in all our tests.
  15:26 <oliver> Hi... I will hope that there is no "mission-critical" reason, that 0.47 tarballs are not there yet ;) ?
  15:29 <filoo_absynth> just out of curiosity: who here is from germany, the netherlands, belgium or eastern france? 
  15:30  * ao is from Germany.
  15:31 <pmjdebruijn> netherlands here
  15:34 <pmjdebruijn> filoo_absynth: why btw?
  15:41 <nhm> good morning #ceph
  15:42 <oliver> nhm: I have a wget-loop running for 0.47*.... Do you know, when it will be terminated?
  15:42 <oliver> nhm: good afternoon ;)=
  15:43 <nhm> oliver: when you stop it? ;)
  15:43 <oliver> Hehe
  15:44 <nhm> oliver: honestly no idea.  I haven't been focusing on the releases much.
  15:44 <nhm> oliver: oh, supposedly it was released 8 hours ago!
  15:44 <nhm> http://ceph.com/releases/v0-47-released/ 
  15:45 <nhm> xnox: I'd give xfs a try.

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