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msg00251
2007 Jun 30
2
checksum-xattr.diff [CVS update: rsync/patches]
...change for
rsync being able to skip the file, other tools that use ctime (such as
GNU tar incremental backups) unnecessarily reprocess it. Beagle also
caches checksums in xattrs, and one of its users complained about the
effect on the ctime:
http://www.mail-archive.com/dashboard-hackers@gnome.org/msg03251.html
Second, it is impossible to make xattr-based checksum caching
foolproof against same-second modification. Suppose a file is written
during second 5 and then rsync caches its checksum during second 8;
now the file has mtime 5 and ctime 8. Sometime later, rsync notices
that the file still has...