== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:46:09 (1779871569)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.481365s, 5.66276MB/s
Read-ahead success for size 8192

2.052097s, 4.08782MB/s
Read-ahead success for size 16384

1.744480s, 4.80866MB/s
Read-ahead success for size 32768

1.935543s, 4.33398MB/s
Read-ahead success for size 65536

1.412803s, 5.93756MB/s
Read-ahead success for size 131072

1.436311s, 5.84038MB/s
Read-ahead success for size 262144

1.412077s, 5.94062MB/s
Read-ahead success for size 524288

1.275718s, 6.5756MB/s
Read-ahead success for size 1048576