== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:44:55 (1785966295)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.163567s, 3.87721MB/s
Read-ahead success for size 8192

2.436005s, 3.44359MB/s
Read-ahead success for size 16384

2.337454s, 3.58878MB/s
Read-ahead success for size 32768

2.292753s, 3.65875MB/s
Read-ahead success for size 65536

1.783602s, 4.70318MB/s
Read-ahead success for size 131072

1.850287s, 4.53368MB/s
Read-ahead success for size 262144

1.513305s, 5.54324MB/s
Read-ahead success for size 524288

1.056880s, 7.93714MB/s
Read-ahead success for size 1048576