== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:52:26 (1786978346)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.913253s, 4.38447MB/s
Read-ahead success for size 8192

2.027104s, 4.13822MB/s
Read-ahead success for size 16384

2.216774s, 3.78415MB/s
Read-ahead success for size 32768

2.180988s, 3.84624MB/s
Read-ahead success for size 65536

1.781612s, 4.70844MB/s
Read-ahead success for size 131072

1.538798s, 5.4514MB/s
Read-ahead success for size 262144

1.914001s, 4.38276MB/s
Read-ahead success for size 524288

1.420941s, 5.90356MB/s
Read-ahead success for size 1048576