== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:43:40 (1787841820)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.204732s, 3.80482MB/s
Read-ahead success for size 8192

1.733284s, 4.83972MB/s
Read-ahead success for size 16384

1.818645s, 4.61256MB/s
Read-ahead success for size 32768

1.399131s, 5.99558MB/s
Read-ahead success for size 65536

1.659882s, 5.05374MB/s
Read-ahead success for size 131072

1.635228s, 5.12993MB/s
Read-ahead success for size 262144

1.036283s, 8.0949MB/s
Read-ahead success for size 524288

1.107244s, 7.57612MB/s
Read-ahead success for size 1048576