== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:50:05 (1788562205)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.942410s, 4.31866MB/s
Read-ahead success for size 8192

1.967487s, 4.26362MB/s
Read-ahead success for size 16384

2.504219s, 3.34979MB/s
Read-ahead success for size 32768

2.166286s, 3.87235MB/s
Read-ahead success for size 65536

1.854370s, 4.5237MB/s
Read-ahead success for size 131072

1.886701s, 4.44618MB/s
Read-ahead success for size 262144

1.612803s, 5.20126MB/s
Read-ahead success for size 524288

1.615913s, 5.19125MB/s
Read-ahead success for size 1048576