== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:58:37 (1789520317)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.779063s, 4.71518MB/s
Read-ahead success for size 8192

1.453884s, 5.76979MB/s
Read-ahead success for size 16384

1.789099s, 4.68873MB/s
Read-ahead success for size 32768

1.770018s, 4.73928MB/s
Read-ahead success for size 65536

1.401451s, 5.98566MB/s
Read-ahead success for size 131072

1.721275s, 4.87349MB/s
Read-ahead success for size 262144

1.346971s, 6.22776MB/s
Read-ahead success for size 524288

1.426610s, 5.8801MB/s
Read-ahead success for size 1048576