== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:25:07 (1787855107)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.375114s, 3.53188MB/s
Read-ahead success for size 8192

1.581568s, 5.30398MB/s
Read-ahead success for size 16384

2.107584s, 3.9802MB/s
Read-ahead success for size 32768

1.670105s, 5.0228MB/s
Read-ahead success for size 65536

1.956355s, 4.28788MB/s
Read-ahead success for size 131072

1.873464s, 4.47759MB/s
Read-ahead success for size 262144

1.672089s, 5.01684MB/s
Read-ahead success for size 524288

1.408499s, 5.95571MB/s
Read-ahead success for size 1048576