Thanks Sage, I wories about returned capacity when mounting CephFS. but when disk is full, capacity will showed 50% or 100% Used? On 07/16/2013 11:01 AM, Sage Weil wrote:
On Tue, 16 Jul 2013, Ta Ba Tuan wrote:Hi everyone. I have 83 osds, and every osds have same 2TB, (Capacity sumary is 166TB) I'm using replicate 3 for pools ('data','metadata'). But when mounting Ceph filesystem from somewhere (using: mount -t ceph Monitor_IP:/ /ceph -o name=admin,secret=xxxxxxxxxx") then capacity sumary is showed "160TB"?, I used replicate 3 and I think that it must return 160TB/3=50TB? Filesystem Size Used Avail Use% Mounted on 192.168.32.90:/ 160T 500G 156T 1% /tmp/ceph_mount Please, explain this help me?statfs/df show the raw capacity of the cluster, not the usable capacity. How much data you can store is a (potentially) complex function of your CRUSH rules and replication layout. If you store 1TB, you'll notice the available space will go down by about 2TB (if you're using the default 2x). sage
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