== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:43:57 (1758739437)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

1.632186s, 5.13949MB/s
Read-ahead success for size 8192

1.490985s, 5.62622MB/s
Read-ahead success for size 16384

1.923194s, 4.36181MB/s
Read-ahead success for size 32768

1.498873s, 5.59661MB/s
Read-ahead success for size 65536

1.278033s, 6.56369MB/s
Read-ahead success for size 131072

1.060304s, 7.91151MB/s
Read-ahead success for size 262144

1.088292s, 7.70805MB/s
Read-ahead success for size 524288

1.214370s, 6.90779MB/s
Read-ahead success for size 1048576