== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:30:22 (1787574622)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.017215s, 4.15851MB/s
Read-ahead success for size 8192

2.038319s, 4.11545MB/s
Read-ahead success for size 16384

2.083295s, 4.02661MB/s
Read-ahead success for size 32768

1.550947s, 5.4087MB/s
Read-ahead success for size 65536

1.684128s, 4.98098MB/s
Read-ahead success for size 131072

1.419855s, 5.90807MB/s
Read-ahead success for size 262144

1.373193s, 6.10883MB/s
Read-ahead success for size 524288

1.709339s, 4.90752MB/s
Read-ahead success for size 1048576