== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:44:49 (1787867089)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.959862s, 4.2802MB/s
Read-ahead success for size 8192

2.379542s, 3.5253MB/s
Read-ahead success for size 16384

2.617247s, 3.20513MB/s
Read-ahead success for size 32768

1.733003s, 4.8405MB/s
Read-ahead success for size 65536

1.694666s, 4.95001MB/s
Read-ahead success for size 131072

1.371371s, 6.11695MB/s
Read-ahead success for size 262144

1.543939s, 5.43325MB/s
Read-ahead success for size 524288

1.684460s, 4.98MB/s
Read-ahead success for size 1048576