On 6/16/12 1:46 PM, Wido den Hollander wrote:
Hi,
On my dev cluster (10 nodes, 40 OSD's) I'm still trying to run Ceph on
btrfs, but over the last couple of months I've lost multiple OSD's due
to btrfs.
On my nodes I've set kernel.panic=60 so that whenever a kernel panic
occurs I get the node back within two minutes.
Now, over the last time I've seen multiple nodes reboot (didn't see the
strace), but afterwards the btrfs filesystems on that node were
unmountable.
"btrfs: open_ctree failed"
I tried various kernels, the most recent 3.3.0 from kernel.ubuntu.com,
but I'm still seeing this.
Is anyone seeing the same or did everybody migrate away to ext4 or XFS?
I still prefer btrfs due to the snapshotting, but loosing all these
OSD's all the time is getting kind of frustrating.
Any thoughts or comments?
Wido
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Hi Wido,
btrfsck might tell you what's wrong. Sounds like there is a
btrfs-restore command in the dangerdonteveruse branch you could try.
Beyond that, I guess it just really comes down to tradeoffs.
Good luck! ;)
Mark
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