== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:01:51 (1790773311)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.920880s, 4.36707MB/s
Read-ahead success for size 8192

2.085654s, 4.02205MB/s
Read-ahead success for size 16384

2.596062s, 3.23128MB/s
Read-ahead success for size 32768

2.316440s, 3.62134MB/s
Read-ahead success for size 65536

2.143665s, 3.91321MB/s
Read-ahead success for size 131072

2.077311s, 4.03821MB/s
Read-ahead success for size 262144

1.687463s, 4.97114MB/s
Read-ahead success for size 524288

1.393014s, 6.02191MB/s
Read-ahead success for size 1048576