== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:08:48 (1788563328)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.201272s, 3.8108MB/s
Read-ahead success for size 8192

1.413097s, 5.93633MB/s
Read-ahead success for size 16384

2.578686s, 3.25306MB/s
Read-ahead success for size 32768

2.525035s, 3.32217MB/s
Read-ahead success for size 65536

1.516021s, 5.53331MB/s
Read-ahead success for size 131072

1.151058s, 7.28774MB/s
Read-ahead success for size 262144

1.099928s, 7.62651MB/s
Read-ahead success for size 524288

1.230499s, 6.81724MB/s
Read-ahead success for size 1048576