13 osd max object name len: 460
14 osd max object namespace len: 64
17 - ceph osd pool create base-pool 4
18 - ceph osd pool create cache-pool 4
19 - ceph osd tier add base-pool cache-pool
20 - ceph osd tier cache-mode cache-pool writeback
21 - ceph osd tier set-overlay base-pool cache-pool
22 - dd if=/dev/urandom of=$TESTDIR/foo bs=1M count=1
23 - rbd import --image-format 2 $TESTDIR/foo base-pool/bar
24 - rbd snap create base-pool/bar@snap
25 - rados -p base-pool cache-flush-evict-all
26 - rbd export base-pool/bar $TESTDIR/bar
27 - rbd export base-pool/bar@snap $TESTDIR/snap
28 - cmp $TESTDIR/foo $TESTDIR/bar
29 - cmp $TESTDIR/foo $TESTDIR/snap
30 - rm $TESTDIR/foo $TESTDIR/bar $TESTDIR/snap