== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:46:07 (1780339567)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.156562s, 3.88981MB/s
Read-ahead success for size 8192

1.860729s, 4.50824MB/s
Read-ahead success for size 16384

2.133623s, 3.93163MB/s
Read-ahead success for size 32768

3.183595s, 2.63495MB/s
Read-ahead success for size 65536

1.138412s, 7.36869MB/s
Read-ahead success for size 131072

1.156400s, 7.25407MB/s
Read-ahead success for size 262144

1.428188s, 5.8736MB/s
Read-ahead success for size 524288

0.915622s, 9.16165MB/s
Read-ahead success for size 1048576