== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:28:55 (1786192135)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.129246s, 7.4285MB/s
Read-ahead success for size 8192

1.098325s, 7.63764MB/s
Read-ahead success for size 16384

1.145280s, 7.3245MB/s
Read-ahead success for size 32768

0.978373s, 8.57404MB/s
Read-ahead success for size 65536

1.039747s, 8.06793MB/s
Read-ahead success for size 131072

0.814717s, 10.2963MB/s
Read-ahead success for size 262144

0.875342s, 9.58323MB/s
Read-ahead success for size 524288

0.857915s, 9.7779MB/s
Read-ahead success for size 1048576