== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:35:52 (1767317752)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.842584s, 4.55263MB/s
Read-ahead success for size 8192

2.280413s, 3.67855MB/s
Read-ahead success for size 16384

1.939289s, 4.32561MB/s
Read-ahead success for size 32768

1.701812s, 4.92922MB/s
Read-ahead success for size 65536

1.682805s, 4.9849MB/s
Read-ahead success for size 131072

1.295242s, 6.47648MB/s
Read-ahead success for size 262144

1.262188s, 6.64608MB/s
Read-ahead success for size 524288

1.653594s, 5.07296MB/s
Read-ahead success for size 1048576