== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:04:19 (1787137459)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.946748s, 8.86044MB/s
Read-ahead success for size 8192

1.883023s, 4.45486MB/s
Read-ahead success for size 16384

2.191665s, 3.8275MB/s
Read-ahead success for size 32768

2.047679s, 4.09664MB/s
Read-ahead success for size 65536

1.769157s, 4.74158MB/s
Read-ahead success for size 131072

1.448460s, 5.7914MB/s
Read-ahead success for size 262144

1.216699s, 6.89456MB/s
Read-ahead success for size 524288

1.312662s, 6.39053MB/s
Read-ahead success for size 1048576