== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:59:27 (1780336767)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.474812s, 5.68792MB/s
Read-ahead success for size 8192

1.326460s, 6.32406MB/s
Read-ahead success for size 16384

1.791636s, 4.68209MB/s
Read-ahead success for size 32768

1.868907s, 4.48851MB/s
Read-ahead success for size 65536

1.545027s, 5.42942MB/s
Read-ahead success for size 131072

1.008260s, 8.31989MB/s
Read-ahead success for size 262144

1.129675s, 7.42568MB/s
Read-ahead success for size 524288

1.487612s, 5.63898MB/s
Read-ahead success for size 1048576