== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:51:01 (1788778261)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.420925s, 5.90362MB/s
Read-ahead success for size 8192

1.599106s, 5.24581MB/s
Read-ahead success for size 16384

1.599594s, 5.24421MB/s
Read-ahead success for size 32768

1.893074s, 4.43121MB/s
Read-ahead success for size 65536

1.582128s, 5.3021MB/s
Read-ahead success for size 131072

1.321419s, 6.34818MB/s
Read-ahead success for size 262144

1.241626s, 6.75615MB/s
Read-ahead success for size 524288

1.216245s, 6.89714MB/s
Read-ahead success for size 1048576