== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:23:32 (1786371812)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.606512s, 5.22163MB/s
Read-ahead success for size 8192

1.548022s, 5.41892MB/s
Read-ahead success for size 16384

1.966361s, 4.26606MB/s
Read-ahead success for size 32768

1.772919s, 4.73152MB/s
Read-ahead success for size 65536

1.728408s, 4.85337MB/s
Read-ahead success for size 131072

1.663156s, 5.04379MB/s
Read-ahead success for size 262144

1.009296s, 8.31135MB/s
Read-ahead success for size 524288

0.858960s, 9.76601MB/s
Read-ahead success for size 1048576