== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:51:04 (1787835064)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.244337s, 3.73768MB/s
Read-ahead success for size 8192

3.259835s, 2.57332MB/s
Read-ahead success for size 16384

3.202716s, 2.61922MB/s
Read-ahead success for size 32768

2.092787s, 4.00834MB/s
Read-ahead success for size 65536

1.885980s, 4.44788MB/s
Read-ahead success for size 131072

2.038672s, 4.11474MB/s
Read-ahead success for size 262144

1.733718s, 4.83851MB/s
Read-ahead success for size 524288

1.246103s, 6.73187MB/s
Read-ahead success for size 1048576