Le 31/03/2016 22:49, Chris Murray a écrit : > Hi, > > I'm trying to troubleshoot a ceph cluster which doesn't seem to be > honouring BTRFS compression on some OSDs. Can anyone offer some help? Is > it likely to be a ceph issue or a BTRFS one? Or something else? I've > asked on ceph-users already, but not received a response yet. > > Config is set to mount with "noatime,nodiratime,compress-force=lzo" > > Some OSDs have been getting much more full than others though, which I > think is something to do with these 'tmp' mounts e.g. below: Note that there are other reasons for unbalanced storage on Ceph OSD. The main reason is too few PGs (there's a calculator on ceph.com, google for it). These tmp mounts aren't normal, you should find out what is causing them. So it might be a Ceph issue (too few PGs) or a system issue (some component trying to use your filesystems for its own purposes). You might have more luck on the ceph-users list (post your Ceph version, the result of ceph osd tree, df on all OSDs and hunt for the process creating theses mounts on your systems). It's probably not a Btrfs issue (I run a Ceph on Btrfs cluster in production and I've never seen this kind of problem). Lionel -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
