Perhaps Cristian is thinking of the clone from journal work that we were
talking about last year:
http://wiki.ceph.com/Planning/Sideboard/osd%3A_clone_from_journal_on_btrfs
I think we never did much beyond Sage's test branch, and it didn't seem
to help as much as you would hope. Speaking of which, I believe this
would open us up to horrible journal fragmentation, especially with rbd
on btrfs.
Mark
On 07/28/2014 12:37 PM, Gregory Farnum wrote:
It still helps; the journal does just as much work. Less of the work
*can* be in the critical path for IO, but for most of the applications
it will be.
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
On Sat, Jul 26, 2014 at 2:18 AM, Cristian Falcas
<cristi.fal...@gmail.com> wrote:
Hello,
I'm using btrfs for OSDs and want to know if it still helps to have the
journal on a faster drive. From what I've read I'm under the impression that
with btrfs journal, the OSD journal doesn't do much work anymore.
Best regards,
Cristian Falcas
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