== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:53:11 (1780451591)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.134072s, 3.9308MB/s
Read-ahead success for size 8192

2.089714s, 4.01424MB/s
Read-ahead success for size 16384

2.081532s, 4.03002MB/s
Read-ahead success for size 32768

1.409651s, 5.95084MB/s
Read-ahead success for size 65536

1.139195s, 7.36363MB/s
Read-ahead success for size 131072

0.934057s, 8.98083MB/s
Read-ahead success for size 262144

1.251878s, 6.70082MB/s
Read-ahead success for size 524288

1.320794s, 6.35119MB/s
Read-ahead success for size 1048576