== sanity test 311: disable OSP precreate, and unlink should destroy objs ========================================================== 23:21:41 (1789269701)
old_iused=446
 - open/close 480 (time 1789269717.71 total 10.01 last 47.94)
 - open/close 930 (time 1789269727.73 total 20.03 last 44.92)
total: 1000 open/close in 21.09 seconds: 47.42 ops/second
suppose current old_iused=1446
create_count=32, max_create_count=20000
 - unlinked 0 (time 1789269739 ; total 0 ; last 0)
total: 1000 unlinks in 9 seconds: 111.111115 unlinks/second
sleep 5 for ZFS MDS
sleep 5 for ZFS OST
Waiting for MDT destroys to complete
sleep 20 for ZFS MDS
438 
waited 1 sec, old Iused 1446, new Iused 438