== sanity test 123aa: verify statahead work ============== 00:37:45 (1780979865)
striped dir -i1 -c2 -H crush /mnt/lustre/d123aa.sanity
total: 100 open/close in 1.42 seconds: 70.49 ops/second
llite.lustre-ffff9354c7fa1000.statahead_max=0
101

real	0m1.617s
user	0m0.006s
sys	0m0.124s
ls -l 100 files without statahead: 1 sec
llite.lustre-ffff9354c7fa1000.statahead_max=32
32
101

real	0m0.439s
user	0m0.006s
sys	0m0.054s
ls -l 100 files with statahead: 0 sec
statahead total: 26
statahead wrong: 0
agl total: 26
 - open/close 624 (time 1780979887.39 total 10.01 last 62.35)
total: 900 open/close in 13.71 seconds: 65.65 ops/second
llite.lustre-ffff9354c7fa1000.statahead_max=0
1001

real	0m13.522s
user	0m0.038s
sys	0m1.363s
ls -l 1000 files without statahead: 13 sec
llite.lustre-ffff9354c7fa1000.statahead_max=32
32
1001

real	0m2.855s
user	0m0.023s
sys	0m0.406s
ls -l 1000 files with statahead: 3 sec
statahead total: 27
statahead wrong: 0
agl total: 27
ls -l done
rm -r /mnt/lustre/d123aa.sanity/: 9 seconds
rm done
statahead total: 27
statahead wrong: 0
agl total: 27