== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:32:49 (1788748369)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.729540s, 4.8502MB/s
Read-ahead success for size 8192

1.832749s, 4.57706MB/s
Read-ahead success for size 16384

2.251943s, 3.72505MB/s
Read-ahead success for size 32768

1.277362s, 6.56713MB/s
Read-ahead success for size 65536

1.436041s, 5.84148MB/s
Read-ahead success for size 131072

0.976935s, 8.58666MB/s
Read-ahead success for size 262144

1.295495s, 6.47521MB/s
Read-ahead success for size 524288

0.701250s, 11.9624MB/s
Read-ahead success for size 1048576