== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:02:10 (1788465730)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.501768s, 5.58582MB/s
Read-ahead success for size 8192

2.026411s, 4.13964MB/s
Read-ahead success for size 16384

3.345612s, 2.50735MB/s
Read-ahead success for size 32768

1.850713s, 4.53264MB/s
Read-ahead success for size 65536

1.471132s, 5.70215MB/s
Read-ahead success for size 131072

1.334231s, 6.28722MB/s
Read-ahead success for size 262144

1.803858s, 4.65037MB/s
Read-ahead success for size 524288

1.547401s, 5.4211MB/s
Read-ahead success for size 1048576