== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:18:35 (1753427915)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.657461s, 12.7591MB/s
Read-ahead success for size 8192

0.610153s, 13.7484MB/s
Read-ahead success for size 16384

0.659079s, 12.7278MB/s
Read-ahead success for size 32768

0.644407s, 13.0176MB/s
Read-ahead success for size 65536

0.554015s, 15.1415MB/s
Read-ahead success for size 131072

0.499265s, 16.8019MB/s
Read-ahead success for size 262144

0.481266s, 17.4303MB/s
Read-ahead success for size 524288

0.477836s, 17.5554MB/s
Read-ahead success for size 1048576