http://ceph.com/docs/master/rados/operations/placement-groups/
2013/10/5 Linux Chips <linux.ch...@gmail.com> > Hi every one; > we have a small testing cluster, one node with 4 OSDs of 3TB each. i > created one RBD image of 4TB. now the cluster is nearly full: > > # ceph df > GLOBAL: > SIZE AVAIL RAW USED %RAW USED > 11178G 1783G 8986G 80.39 > > POOLS: > NAME ID USED %USED OBJECTS > data 0 0 0 0 > metadata 1 40100K 0 30 > rbd 2 3703G 33.13 478583 > > > > # df -h > Filesystem Size Used Avail Use% Mounted on > /dev/mapper/cephtest1-root 181G 19G 153G 11% / > udev 48G 4.0K 48G 1% /dev > tmpfs 19G 592K 19G 1% /run > none 5.0M 0 5.0M 0% /run/lock > none 48G 0 48G 0% /run/shm > /dev/sde1 228M 27M 189M 13% /boot > /dev/sda 2.8T 2.1T 566G 79% /var/lib/ceph/osd/ceph-0 > /dev/sdb 2.8T 2.4T 316G 89% /var/lib/ceph/osd/ceph-1 > /dev/sdc 2.8T 2.2T 457G 84% /var/lib/ceph/osd/ceph-2 > /dev/sdd 2.8T 2.2T 447G 84% /var/lib/ceph/osd/ceph-3 > > > # rbd list -l > NAME SIZE PARENT FMT PROT LOCK > share2 3906G 1 > > # rbd info share2 > rbd image 'share2': > size 3906 GB in 500000 objects > order 23 (8192 KB objects) > block_name_prefix: rb.0.1056.2ae8944a > format: 1 > > > # ceph osd pool get rbd min_size > min_size: 1 > > # ceph osd pool get rbd size > size: 2 > > > 4 disk at 3TB should give me 12TB, and 4TBx2 should be 8TB. that is 66% > not 80% as the ceph df shows (%RAW). > where is this space is leaking? how can i fix it? > or is this normal behavior and this is due to overhead? > thanks > Ali > ______________________________**_________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/**listinfo.cgi/ceph-users-ceph.**com<http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com> >
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