== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:46:58 (1782866818)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.671195s, 12.498MB/s
Read-ahead success for size 8192

0.647812s, 12.9491MB/s
Read-ahead success for size 16384

0.706078s, 11.8806MB/s
Read-ahead success for size 32768

0.682127s, 12.2977MB/s
Read-ahead success for size 65536

0.581040s, 14.4372MB/s
Read-ahead success for size 131072

0.584768s, 14.3452MB/s
Read-ahead success for size 262144

0.525213s, 15.9718MB/s
Read-ahead success for size 524288

0.513116s, 16.3484MB/s
Read-ahead success for size 1048576