== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:19:16 (1746130756)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.970464s, 8.64391MB/s
Read-ahead success for size 8192

0.810549s, 10.3493MB/s
Read-ahead success for size 16384

0.829165s, 10.1169MB/s
Read-ahead success for size 32768

0.733026s, 11.4438MB/s
Read-ahead success for size 65536

0.577772s, 14.5189MB/s
Read-ahead success for size 131072

0.488873s, 17.1591MB/s
Read-ahead success for size 262144

0.537659s, 15.6021MB/s
Read-ahead success for size 524288

0.528989s, 15.8578MB/s
Read-ahead success for size 1048576