我发现rsync在以下两种情况下表现不同：
(1) 使用 using 复制所有文件rsync，然后rsync再次使用会很快（跳过所有文件）；
(2)cp用于复制文件，然后使用 rsync 会很慢（或者可能是重新运行？）
所以我的困惑是“是否会rsync在文件上生成任何内部内容以便它可以引用以避免重复检查？”
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rsync -a (in archive mode, which I presume you ran) retains all attributes of a file, including creation/modification time. cp does not. I suppose something in the file attributes that's different when you use cp, probably a later modification time, in the destination files, made rsync think they are newer files, so it either recopied them or had to check the contents.
于 2012-04-17T08:56:38.673 回答