== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:40:49 (1787794849)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.476229s, 5.68246MB/s
Read-ahead success for size 8192

1.465893s, 5.72252MB/s
Read-ahead success for size 16384

1.470106s, 5.70612MB/s
Read-ahead success for size 32768

1.399494s, 5.99403MB/s
Read-ahead success for size 65536

1.265798s, 6.62713MB/s
Read-ahead success for size 131072

1.312165s, 6.39295MB/s
Read-ahead success for size 262144

0.957561s, 8.76039MB/s
Read-ahead success for size 524288

0.909792s, 9.22036MB/s
Read-ahead success for size 1048576