== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:21:57 (1788668517)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

2.177804s, 3.85187MB/s
Read-ahead success for size 8192

1.253114s, 6.69421MB/s
Read-ahead success for size 16384

1.813980s, 4.62442MB/s
Read-ahead success for size 32768

1.640990s, 5.11192MB/s
Read-ahead success for size 65536

1.726110s, 4.85983MB/s
Read-ahead success for size 131072

1.478597s, 5.67336MB/s
Read-ahead success for size 262144

1.430933s, 5.86233MB/s
Read-ahead success for size 524288

1.212621s, 6.91775MB/s
Read-ahead success for size 1048576