== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:13:07 (1785935587)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.111294s, 3.97321MB/s
Read-ahead success for size 8192

1.928247s, 4.35038MB/s
Read-ahead success for size 16384

3.142971s, 2.66901MB/s
Read-ahead success for size 32768

2.753799s, 3.04619MB/s
Read-ahead success for size 65536

1.665642s, 5.03626MB/s
Read-ahead success for size 131072

2.171097s, 3.86376MB/s
Read-ahead success for size 262144

1.281401s, 6.54643MB/s
Read-ahead success for size 524288

2.574648s, 3.25816MB/s
Read-ahead success for size 1048576