== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:58:41 (1788487121)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.631133s, 5.14281MB/s
Read-ahead success for size 8192

1.753362s, 4.7843MB/s
Read-ahead success for size 16384

2.034417s, 4.12335MB/s
Read-ahead success for size 32768

1.977986s, 4.24098MB/s
Read-ahead success for size 65536

1.131474s, 7.41388MB/s
Read-ahead success for size 131072

1.526982s, 5.49359MB/s
Read-ahead success for size 262144

1.291863s, 6.49342MB/s
Read-ahead success for size 524288

1.509878s, 5.55582MB/s
Read-ahead success for size 1048576