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: /dev/sdc1 on /var/lib/ceph/tmp/mnt.AywYKY type btrfs (rw,noatime,space_cache,user_subvol_rm_allowed,subvolid=5,subvol=/) /dev/sdd1 on /var/lib/ceph/osd/ceph-16 type btrfs (rw,noatime,nodiratime,compress-force=lzo,space_cache,subvolid=5,subvol= /) /dev/sdc1 on /var/lib/ceph/osd/ceph-15 type btrfs (rw,noatime,nodiratime,space_cache,user_subvol_rm_allowed,subvolid=5,sub vol=/) /dev/sdb1 on /var/lib/ceph/osd/ceph-20 type btrfs (rw,noatime,nodiratime,compress-force=lzo,space_cache,subvolid=5,subvol= /) After a reboot, it's moved to another drive: /dev/sdd1 on /var/lib/ceph/tmp/mnt.kWh2NA type btrfs (rw,noatime,space_cache,user_subvol_rm_allowed,subvolid=5,subvol=/) /dev/sdd1 on /var/lib/ceph/osd/ceph-16 type btrfs (rw,noatime,nodiratime,space_cache,user_subvol_rm_allowed,subvolid=5,sub vol=/) /dev/sdc1 on /var/lib/ceph/osd/ceph-15 type btrfs (rw,noatime,nodiratime,compress-force=lzo,space_cache,subvolid=5,subvol= /) /dev/sdb1 on /var/lib/ceph/osd/ceph-20 type btrfs (rw,noatime,nodiratime,compress-force=lzo,space_cache,subvolid=5,subvol= /) I'm using Proxmox, based on Debian. Kernel version 4.2.8-1-pve. Btrfs v3.17. Thank you, Chris -- 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
