On Tue, 25 Oct 2011, Christoph Hellwig wrote: > On Mon, Oct 24, 2011 at 10:06:49AM -0700, Sage Weil wrote: > > > - When I run ceph with btrfs snaps disabled, the situation is getting > > > slightly better. I can run an OSD for about 3 days without problems, > > > but then again the load increases. This time, I can see that the > > > ceph-osd (blkdev_issue_flush) and btrfs-endio-wri are doing more work > > > than usual. > > > > FYI in this scenario you're exposed to the same journal replay issues that > > ext4 and XFS are. The btrfs workload that ceph is generating will also > > not be all that special, though, so this problem shouldn't be unique to > > ceph. > > What journal replay issues would ext4 and XFS be exposed to? It's the ceph-osd journal replay, not the ext4/XFS journal... the #2 item in http://marc.info/?l=ceph-devel&m=131942130322957&w=2 sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
