== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:03:46 (1790942626)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.785287s, 4.69874MB/s
Read-ahead success for size 8192

1.721350s, 4.87327MB/s
Read-ahead success for size 16384

2.035226s, 4.12171MB/s
Read-ahead success for size 32768

2.329080s, 3.60168MB/s
Read-ahead success for size 65536

1.746328s, 4.80357MB/s
Read-ahead success for size 131072

1.654066s, 5.07151MB/s
Read-ahead success for size 262144

1.619236s, 5.1806MB/s
Read-ahead success for size 524288

1.159959s, 7.23181MB/s
Read-ahead success for size 1048576