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Forwarded Message
Subject: Re: [ceph-users] Unexpected disk write activity with btrfs OSDs
Date:Fri, 19 Jun 2015 09:06:33 +0200
From:Burkhard Linke
burkhard.li...@computational.bio.uni-giessen.de
mailto:burkhard.li...@computational.bio.uni-giessen.de
To: Lionel
On Tue, Jun 23, 2015 at 9:50 AM, Erik Logtenberg e...@logtenberg.eu wrote:
Thanks!
Just so I understand correctly, the btrfs snapshots are mainly useful if
the journals are on the same disk as the osd, right? Is it indeed safe
to turn them off if the journals are on a separate ssd?
That's
Thanks!
Just so I understand correctly, the btrfs snapshots are mainly useful if
the journals are on the same disk as the osd, right? Is it indeed safe
to turn them off if the journals are on a separate ssd?
Kind regards,
Erik.
On 22-06-15 20:18, Krzysztof Nowicki wrote:
pon., 22.06.2015 o
On Tue, Jun 23, 2015 at 12:17 PM, Lionel Bouton
lionel-subscript...@bouton.name wrote:
On 06/23/15 11:43, Gregory Farnum wrote:
On Tue, Jun 23, 2015 at 9:50 AM, Erik Logtenberg e...@logtenberg.eu wrote:
Thanks!
Just so I understand correctly, the btrfs snapshots are mainly useful if
the
On 06/22/15 17:21, Erik Logtenberg wrote:
I have the journals on a separate disk too. How do you disable the
snapshotting on the OSD?
http://ceph.com/docs/master/rados/configuration/filestore-config-ref/ :
filestore btrfs snap = false
___
ceph-users
...@bouton.name wrote:
On 06/19/15 13:42, Burkhard Linke wrote:
Forget the reply to the list...
Forwarded Message Subject: Re: [ceph-users] Unexpected
disk write activity with btrfs OSDs Date: Fri, 19 Jun 2015 09:06:33 +0200
From:
Burkhard Linke burkhard.li
On 06/19/15 13:23, Erik Logtenberg wrote:
I believe this may be the same issue I reported some time ago, which is
as of yet unsolved.
https://www.mail-archive.com/ceph-users@lists.ceph.com/msg19770.html
I used strace to figure out that the OSD's were doing an incredible
amount of getxattr,
On 06/22/15 11:27, Jan Schermer wrote:
I don’t run Ceph on btrfs, but isn’t this related to the btrfs
snapshotting feature ceph uses to ensure a consistent journal?
It's possible: if I understand correctly the code, the btrfs filestore
backend creates a snapshot when syncing the journal. I'm a
pon., 22.06.2015 o 13:11 użytkownik Lionel Bouton lionel+c...@bouton.name
napisał:
On 06/22/15 11:27, Jan Schermer wrote:
I don’t run Ceph on btrfs, but isn’t this related to the btrfs
snapshotting feature ceph uses to ensure a consistent journal?
It's possible: if I understand correctly
the reply to the list...
Forwarded Message
Subject: Re: [ceph-users] Unexpected disk write activity with btrfs OSDs
Date:Fri, 19 Jun 2015 09:06:33 +0200
From:Burkhard Linke
burkhard.li...@computational.bio.uni-giessen.de
mailto:burkhard.li
pon., 22.06.2015 o 20:09 użytkownik Lionel Bouton
lionel-subscript...@bouton.name napisał:
On 06/22/15 17:21, Erik Logtenberg wrote:
I have the journals on a separate disk too. How do you disable the
snapshotting on the OSD?
I just realized I forgot to add a proper context :
this is with Firefly 0.80.9 and the btrfs OSDs are running on kernel
4.0.5 (this was happening with previous kernel versions according to our
monitoring history), xfs OSDs run on 4.0.5 or 3.18.9. There are 23 OSDs
total and 2 of them are using
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