== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:00:54 (1775196054)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.689083s, 4.96637MB/s
Read-ahead success for size 8192

1.618215s, 5.18386MB/s
Read-ahead success for size 16384

2.318443s, 3.61821MB/s
Read-ahead success for size 32768

1.750302s, 4.79266MB/s
Read-ahead success for size 65536

1.272171s, 6.59393MB/s
Read-ahead success for size 131072

1.372810s, 6.11054MB/s
Read-ahead success for size 262144

1.409062s, 5.95333MB/s
Read-ahead success for size 524288

1.391623s, 6.02793MB/s
Read-ahead success for size 1048576