== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:52:38 (1788180758)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.874226s, 4.47577MB/s
Read-ahead success for size 8192

2.346514s, 3.57492MB/s
Read-ahead success for size 16384

2.629141s, 3.19063MB/s
Read-ahead success for size 32768

2.600356s, 3.22595MB/s
Read-ahead success for size 65536

1.026170s, 8.17468MB/s
Read-ahead success for size 131072

1.352779s, 6.20102MB/s
Read-ahead success for size 262144

0.967710s, 8.66851MB/s
Read-ahead success for size 524288

1.147865s, 7.30801MB/s
Read-ahead success for size 1048576