mount cephfs to /mnt/mycehfs on debian 7, kernel3.10 eg: have one file root@test-debian:/mnt/mycephfs# ls -i test.txt 1099511627776 test.txt root@test-debian:/mnt/mycephfs# ceph osd map volumes test.txt osdmap e351 pool 'volumes' (3) object 'test.txt' -> pg 3.8b0b6108 (3.8) -> up [5,3] acting [5,3] root@test-debian:/mnt/mycephfs# ceph osd pool get volumes size size: 2 root@test-debian:/mnt/mycephfs# ceph osd stat e351: 7 osds: 7 up, 7 in root@test-debian:/mnt/mycephfs# ceph osd dump
epoch 351 fsid db32486a-7ad3-4afe-8b67-49ee2a6dcecf created 2013-08-08 13:45:52.579015 modified 2013-08-15 02:39:45.473969 flags pool 0 'data' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 192 pgp_num 192 last_change 1 owner 0 crash_replay_interval 45 pool 1 'metadata' rep size 2 min_size 1 crush_ruleset 1 object_hash rjenkins pg_num 192 pgp_num 192 last_change 1 owner 0 pool 2 'rbd' rep size 2 min_size 1 crush_ruleset 2 object_hash rjenkins pg_num 192 pgp_num 192 last_change 1 owner 0 pool 3 'volumes' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 256 pgp_num 256 last_change 220 owner 18446744073709551615 how to know where is store in ceph,which object, which pg? i want understand how ceph work. pls give your guide. best wish.
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