== sanity test 101b: check stride-io mode read-ahead =========================================================================== 01:32:46 (1789018366)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

1.741977s, 4.81557MB/s
Read-ahead success for size 8192

1.855134s, 4.52183MB/s
Read-ahead success for size 16384

2.262463s, 3.70773MB/s
Read-ahead success for size 32768

1.854732s, 4.52281MB/s
Read-ahead success for size 65536

1.411207s, 5.94428MB/s
Read-ahead success for size 131072

1.426341s, 5.88121MB/s
Read-ahead success for size 262144

1.763921s, 4.75566MB/s
Read-ahead success for size 524288

1.404911s, 5.97092MB/s
Read-ahead success for size 1048576