== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:05:15 (1772759115)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.731498s, 11.4677MB/s
Read-ahead success for size 8192

0.626502s, 13.3896MB/s
Read-ahead success for size 16384

0.645947s, 12.9865MB/s
Read-ahead success for size 32768

0.600495s, 13.9695MB/s
Read-ahead success for size 65536

0.513491s, 16.3364MB/s
Read-ahead success for size 131072

0.428322s, 19.5848MB/s
Read-ahead success for size 262144

0.430375s, 19.4914MB/s
Read-ahead success for size 524288

0.443574s, 18.9114MB/s
Read-ahead success for size 1048576