== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:22:06 (1718317326)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

4.474568s, 1.87473MB/s
Read-ahead success for size 8192

4.975245s, 1.68607MB/s
Read-ahead success for size 16384

4.229992s, 1.98313MB/s
Read-ahead success for size 32768

4.631934s, 1.81104MB/s
Read-ahead success for size 65536

4.133912s, 2.02922MB/s
Read-ahead success for size 131072

4.357877s, 1.92493MB/s
Read-ahead success for size 262144

3.696720s, 2.2692MB/s
Read-ahead success for size 524288

4.167313s, 2.01295MB/s
Read-ahead success for size 1048576