== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:47:42 (1786963662)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.864529s, 4.49905MB/s
Read-ahead success for size 8192

1.752379s, 4.78698MB/s
Read-ahead success for size 16384

2.766300s, 3.03243MB/s
Read-ahead success for size 32768

1.795484s, 4.67206MB/s
Read-ahead success for size 65536

1.463383s, 5.73234MB/s
Read-ahead success for size 131072

1.749484s, 4.7949MB/s
Read-ahead success for size 262144

1.323720s, 6.33715MB/s
Read-ahead success for size 524288

1.236794s, 6.78254MB/s
Read-ahead success for size 1048576