== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:40:33 (1787863233)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.624811s, 5.16282MB/s
Read-ahead success for size 8192

1.400608s, 5.98926MB/s
Read-ahead success for size 16384

1.803731s, 4.6507MB/s
Read-ahead success for size 32768

1.543817s, 5.43368MB/s
Read-ahead success for size 65536

1.647459s, 5.09185MB/s
Read-ahead success for size 131072

1.657314s, 5.06157MB/s
Read-ahead success for size 262144

1.521458s, 5.51353MB/s
Read-ahead success for size 524288

1.646060s, 5.09617MB/s
Read-ahead success for size 1048576