== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:46:08 (1782222368)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.899231s, 4.41684MB/s
Read-ahead success for size 8192

1.997946s, 4.19862MB/s
Read-ahead success for size 16384

2.080545s, 4.03193MB/s
Read-ahead success for size 32768

1.562250s, 5.36957MB/s
Read-ahead success for size 65536

1.174269s, 7.14369MB/s
Read-ahead success for size 131072

1.452162s, 5.77663MB/s
Read-ahead success for size 262144

1.331519s, 6.30003MB/s
Read-ahead success for size 524288

1.297576s, 6.46483MB/s
Read-ahead success for size 1048576