我只用SCP来复制大量的文件，从不关心它们是否存在于目的地…这可以用scp来完成吗？ 还有另一个解决scheme会更好吗？
它从一台服务器复制到另一台服务器。
我使用rsync 。
见http://www.manpagez.com/man/1/rsync/
DESCRIPTION Rsync is a fast and extraordinarily versatile file copying tool. It can copy locally, to/from another host over any remote shell, or to/from a remote rsync daemon. It offers a large number of options that control every aspect of its behavior and permit very flexible specification of the set of files to be copied. It is famous for its delta-transfer algorithm, which reduces the amount of data sent over the network by sending only the differences between the source files and the existing files in the destination. Rsync is widely used for backups and mirroring and as an improved copy command for everyday use. Rsync finds files that need to be transferred using a "quick check" algorithm (by default) that looks for files that have changed in size or in last-modified time. Any changes in the other preserved attributes (as requested by options) are made on the destination file directly when the quick check indicates that the file's data does not need to be updated.
在（不太可能）的情况下，您的需求超出了rsync的function，您可能需要考虑rdist。
Rdist is a program to maintain identical copies of files over multiple hosts. It preserves the owner, group, mode, and mtime of files if possible and can update programs that are executing. Rdist reads commands from distfile to direct the updating of files and/or directories. If distfile is '-', the standard input is used. If no -f option is present, the program looks first for 'distfile', then 'Distfile' to use as the input. If no names are specified on the command line, rdist will update all of the files and directories listed in distfile.
干杯。