On Tuesday, February 10, 2004 12:30 AM, Jason M. Felice wrote: > On Tue, Feb 10, 2004 at 10:11:09AM +1100, Donovan Baarda wrote: > > On Tue, 2004-02-10 at 07:48, Jason M. Felice wrote: > > > This patch adds the --link-by-hash=DIR option, which hard links received > > > files in a link farm arranged by MD4 file hash. The result is that the system > > > will only store one copy of the unique contents of each file, regardless of > > > the file's name. > > > > Does this mean it also automatically detects renames? > > No. It can't detect whether two files have identical contents until > after the file has been transferred. This patch can only save disk > space, not bandwidth. > This is an idea of how to detect file renames: 1. Create the md4 farm for all files in the destination directory hierarchy before transfers starts. 2. For all recieved files the md4 farm is updated. 3. When a renamed or hard linked file is encountered, rsync will detect this. 4. After rsync is done the farm is deleted.
Well, This is of cource a brute force idea. The initial md4 farm should probably first be created in memory and the files only when needed. /Hans Eric Sandström MailCORE AB -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
