== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:55:25 (1731750925)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

4.476134s, 1.87407MB/s
Read-ahead success for size 8192

4.586718s, 1.82889MB/s
Read-ahead success for size 16384

4.398624s, 1.9071MB/s
Read-ahead success for size 32768

3.929121s, 2.13498MB/s
Read-ahead success for size 65536

3.768137s, 2.2262MB/s
Read-ahead success for size 131072

3.788406s, 2.21428MB/s
Read-ahead success for size 262144

3.616259s, 2.31969MB/s
Read-ahead success for size 524288

3.529058s, 2.37701MB/s
Read-ahead success for size 1048576