== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:55:31 (1787871331)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.558755s, 5.38161MB/s
Read-ahead success for size 8192

1.828090s, 4.58873MB/s
Read-ahead success for size 16384

1.726746s, 4.85804MB/s
Read-ahead success for size 32768

1.387792s, 6.04457MB/s
Read-ahead success for size 65536

0.993920s, 8.43992MB/s
Read-ahead success for size 131072

1.402398s, 5.98162MB/s
Read-ahead success for size 262144

1.140552s, 7.35487MB/s
Read-ahead success for size 524288

1.695463s, 4.94768MB/s
Read-ahead success for size 1048576