== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:25:21 (1787844321)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.286748s, 3.66836MB/s
Read-ahead success for size 8192

2.421767s, 3.46384MB/s
Read-ahead success for size 16384

2.373629s, 3.53409MB/s
Read-ahead success for size 32768

1.766314s, 4.74922MB/s
Read-ahead success for size 65536

1.758845s, 4.76938MB/s
Read-ahead success for size 131072

1.881702s, 4.45799MB/s
Read-ahead success for size 262144

1.562940s, 5.3672MB/s
Read-ahead success for size 524288

1.940096s, 4.32381MB/s
Read-ahead success for size 1048576