== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:14:02 (1788621242)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.972486s, 4.25281MB/s
Read-ahead success for size 8192

1.710564s, 4.904MB/s
Read-ahead success for size 16384

1.925297s, 4.35705MB/s
Read-ahead success for size 32768

1.636718s, 5.12526MB/s
Read-ahead success for size 65536

1.418920s, 5.91197MB/s
Read-ahead success for size 131072

1.264105s, 6.63601MB/s
Read-ahead success for size 262144

1.332757s, 6.29418MB/s
Read-ahead success for size 524288

1.045473s, 8.02374MB/s
Read-ahead success for size 1048576