== sanity test 101b: check stride-io mode read-ahead =========================================================================== 01:39:31 (1769755171)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

2.424261s, 3.46027MB/s
Read-ahead success for size 8192

2.499102s, 3.35665MB/s
Read-ahead success for size 16384

2.479988s, 3.38252MB/s
Read-ahead success for size 32768

2.190161s, 3.83013MB/s
Read-ahead success for size 65536

1.745674s, 4.80537MB/s
Read-ahead success for size 131072

1.896288s, 4.4237MB/s
Read-ahead success for size 262144

2.046300s, 4.0994MB/s
Read-ahead success for size 524288

1.510681s, 5.55287MB/s
Read-ahead success for size 1048576