== sanity test 60c: unlink file when mds full ============ 12:10:10 (1788970210)
create 5000 files
 - open/close 598 (time 1788970225.99 total 10.01 last 59.75)
 - open/close 1166 (time 1788970236.01 total 20.02 last 56.74)
 - open/close 1664 (time 1788970246.02 total 30.03 last 49.73)
 - open/close 2146 (time 1788970256.03 total 40.04 last 48.15)
 - open/close 2625 (time 1788970266.04 total 50.06 last 47.83)
 - open/close 3190 (time 1788970276.07 total 60.08 last 56.36)
 - open/close 3769 (time 1788970286.09 total 70.11 last 57.76)
 - open/close 4308 (time 1788970296.12 total 80.13 last 53.77)
 - open/close 4790 (time 1788970306.14 total 90.16 last 48.07)
total: 5000 open/close in 94.09 seconds: 53.14 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788970314 ; total 0 ; last 0)
total: 5000 unlinks in 63 seconds: 79.365082 unlinks/second
fail_loc=0