We have a ceph cluster with a cephfs filesystem that we use mostly for
backups. When I do a "ceph -s" or a "ceph df", it reports lots of space:
data:
pools: 3 pools, 4104 pgs
objects: 1.09 G objects, 944 TiB
usage: 1.5 PiB used, 1.0 PiB / 2.5 PiB avail
GLOBAL:
SIZE AVAIL RAW USED %RAW USED
2.5 PiB 1.0 PiB 1.5 PiB 59.76
POOLS:
NAME ID USED %USED MAX AVAIL OBJECTS
cephfs_data 2 944 TiB 87.63 133 TiB 880988429
cephfs_metadata 3 128 MiB 0 62 TiB 206535313
.rgw.root 4 0 B 0 62
TiB 0
The whole thing consists of 2 pools: metadata (regular default
replication) and data (erasure k:5 m:2). The global raw space reports
2.5 PiB total, with 1.0 PiB still available. But, when the ceph
filesystem is mounted, it only reports 1.1 PB total, and the filesystem
is almost full:
Filesystem Size Used Avail Use% Mounted on
x.x.x.x:yyyy:/ 1.1P 944T 134T 88% /backups
So, where is the rest of my space? Or what am I missing?
Thanks!
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