我使用rsync传输了近40 GB并使用了以下命令：
rsync -amP --stats username@server.com~:/files home/dir
在完成后给出了输出：
Number of files: 31890
Number of files transferred: 31818
Total file size: 37368071742 bytes
Total transferred file size: 37368071742 bytes
Literal data: 37368071742 bytes
Matched data: 0 bytes
File list size: 1575658
File list generation time: 10.531 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 700370
Total bytes received: 37375644422
sent 700370 bytes received 37375644422 bytes 8239026.74 bytes/sec
total size is 37368071742 speedup is 1.00
我想知道Matched data的含义以及Number of files和Number of files transferred的不同之处？什么是加速？有没有办法判断它是否成功？