== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:52:28 (1788738748)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.475587s, 17.6384MB/s
Read-ahead success for size 8192

0.492995s, 17.0156MB/s
Read-ahead success for size 16384

0.570206s, 14.7115MB/s
Read-ahead success for size 32768

0.532698s, 15.7474MB/s
Read-ahead success for size 65536

0.483682s, 17.3432MB/s
Read-ahead success for size 131072

0.466019s, 18.0006MB/s
Read-ahead success for size 262144

0.445038s, 18.8492MB/s
Read-ahead success for size 524288

0.443493s, 18.9149MB/s
Read-ahead success for size 1048576