== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:55:39 (1739505339)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.708866s, 11.8338MB/s
Read-ahead success for size 8192

0.534951s, 15.6811MB/s
Read-ahead success for size 16384

0.751888s, 11.1567MB/s
Read-ahead success for size 32768

0.559964s, 14.9806MB/s
Read-ahead success for size 65536

0.560541s, 14.9652MB/s
Read-ahead success for size 131072

0.442715s, 18.9481MB/s
Read-ahead success for size 262144

0.444495s, 18.8722MB/s
Read-ahead success for size 524288

0.412253s, 20.3482MB/s
Read-ahead success for size 1048576