== sanity test 60c: unlink file when mds full ============ 09:23:54 (1788528234)
create 5000 files
 - open/close 392 (time 1788528249.01 total 10.01 last 39.16)
 - open/close 804 (time 1788528259.03 total 20.03 last 41.12)
 - open/close 1225 (time 1788528269.04 total 30.04 last 42.04)
 - open/close 1715 (time 1788528279.04 total 40.04 last 49.00)
 - open/close 2212 (time 1788528289.06 total 50.06 last 49.60)
 - open/close 2692 (time 1788528299.07 total 60.06 last 47.99)
 - open/close 3169 (time 1788528309.07 total 70.07 last 47.68)
 - open/close 3628 (time 1788528319.08 total 80.07 last 45.88)
 - open/close 4090 (time 1788528329.08 total 90.08 last 46.17)
 - open/close 4550 (time 1788528339.12 total 100.12 last 45.81)
total: 5000 open/close in 109.87 seconds: 45.51 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788528353 ; total 0 ; last 0)
total: 5000 unlinks in 80 seconds: 62.500000 unlinks/second
fail_loc=0