== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:53:20 (1788728000)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.603580s, 5.23118MB/s
Read-ahead success for size 8192

1.327206s, 6.3205MB/s
Read-ahead success for size 16384

1.563254s, 5.36612MB/s
Read-ahead success for size 32768

1.412290s, 5.93972MB/s
Read-ahead success for size 65536

1.106885s, 7.57857MB/s
Read-ahead success for size 131072

1.274526s, 6.58175MB/s
Read-ahead success for size 262144

1.276494s, 6.5716MB/s
Read-ahead success for size 524288

0.955693s, 8.77751MB/s
Read-ahead success for size 1048576