== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:51:29 (1786949489)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.198713s, 6.99801MB/s
Read-ahead success for size 8192

1.073559s, 7.81383MB/s
Read-ahead success for size 16384

1.298532s, 6.46007MB/s
Read-ahead success for size 32768

1.385390s, 6.05505MB/s
Read-ahead success for size 65536

1.183803s, 7.08615MB/s
Read-ahead success for size 131072

1.269853s, 6.60597MB/s
Read-ahead success for size 262144

1.079046s, 7.7741MB/s
Read-ahead success for size 524288

1.006216s, 8.33679MB/s
Read-ahead success for size 1048576