== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:23:54 (1784046234)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.645441s, 5.09809MB/s
Read-ahead success for size 8192

1.370747s, 6.11973MB/s
Read-ahead success for size 16384

1.957721s, 4.28488MB/s
Read-ahead success for size 32768

1.595845s, 5.25653MB/s
Read-ahead success for size 65536

1.553492s, 5.39984MB/s
Read-ahead success for size 131072

1.557379s, 5.38636MB/s
Read-ahead success for size 262144

0.921977s, 9.0985MB/s
Read-ahead success for size 524288

1.126060s, 7.44952MB/s
Read-ahead success for size 1048576