== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:26:24 (1786004784)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

2.675291s, 3.13559MB/s
Read-ahead success for size 8192

2.101154s, 3.99238MB/s
Read-ahead success for size 16384

2.978192s, 2.81668MB/s
Read-ahead success for size 32768

2.675561s, 3.13527MB/s
Read-ahead success for size 65536

2.096666s, 4.00093MB/s
Read-ahead success for size 131072

3.541760s, 2.36849MB/s
Read-ahead success for size 262144

2.071083s, 4.05035MB/s
Read-ahead success for size 524288

1.389807s, 6.03581MB/s
Read-ahead success for size 1048576