== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:16:02 (1746072962)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

0.494842s, 16.9521MB/s
Read-ahead success for size 8192

0.469863s, 17.8533MB/s
Read-ahead success for size 16384

0.563320s, 14.8914MB/s
Read-ahead success for size 32768

0.479093s, 17.5094MB/s
Read-ahead success for size 65536

0.408228s, 20.5488MB/s
Read-ahead success for size 131072

0.404968s, 20.7142MB/s
Read-ahead success for size 262144

0.362748s, 23.1252MB/s
Read-ahead success for size 524288

0.327802s, 25.5905MB/s
Read-ahead success for size 1048576