== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:39:03 (1787708343)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.962269s, 4.27495MB/s
Read-ahead success for size 8192

2.059889s, 4.07236MB/s
Read-ahead success for size 16384

2.361938s, 3.55158MB/s
Read-ahead success for size 32768

1.607082s, 5.21978MB/s
Read-ahead success for size 65536

1.698623s, 4.93848MB/s
Read-ahead success for size 131072

1.398308s, 5.99911MB/s
Read-ahead success for size 262144

1.193166s, 7.03055MB/s
Read-ahead success for size 524288

1.524273s, 5.50335MB/s
Read-ahead success for size 1048576