== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:58:52 (1734116332)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

4.754813s, 1.76424MB/s
Read-ahead success for size 8192

4.765263s, 1.76037MB/s
Read-ahead success for size 16384

6.068364s, 1.38235MB/s
Read-ahead success for size 32768

5.645264s, 1.48595MB/s
Read-ahead success for size 65536

4.913942s, 1.7071MB/s
Read-ahead success for size 131072

4.054525s, 2.06895MB/s
Read-ahead success for size 262144

3.968991s, 2.11354MB/s
Read-ahead success for size 524288

5.100399s, 1.6447MB/s
Read-ahead success for size 1048576