== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:04:00 (1782482640)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.093127s, 7.67396MB/s
Read-ahead success for size 8192

1.370443s, 6.12109MB/s
Read-ahead success for size 16384

1.343739s, 6.24274MB/s
Read-ahead success for size 32768

1.211673s, 6.92316MB/s
Read-ahead success for size 65536

1.052493s, 7.97023MB/s
Read-ahead success for size 131072

1.094193s, 7.66648MB/s
Read-ahead success for size 262144

0.877799s, 9.55641MB/s
Read-ahead success for size 524288

0.956669s, 8.76856MB/s
Read-ahead success for size 1048576