Thank you Wayne for pointing me to these patches. I've never noticed
them before.
Am 24.05.2009 um 23:53 schrieb Wayne Davison:
On Sun, May 24, 2009 at 06:32:40PM +0200, Christian Hecht wrote:
Such a tool i plan to write for Mac OS X. The first time it should
store checksums and mod times for all files to verify.
There are various patches in the "patches" dir that deal with cached
checksums in different ways:
- checksum-reading.diff & checksum-updating.diff -- both of these
use a
special file in each dir to store the checksums, with the latter
putting code into rsync to be able to update the file when copying
the files (both have a perl script to build/update the files and
check checksums against the file).
- checksum-xattr.diff -- this has a script that puts checksums into an
xattr field which rsync can access when it is using the --checksum
option. The very latest version of this patch (in git) adds a --
list
and --check option to the script.
checksum-xattr.diff -This seems to be a good option for me but i'm a
not sure how to use it exactly.
- First i run the xsum script which generates all the checksums an
stores it in the xattrs
- Then i use rync which can compare the stored checksums with the
actual new generated checksum, right? I assume if the checksums are
different, there will be some message in log. But if a file has
changed meanwhile, the checksum also will be different. How can rsync
distinguish between these caes?
- To update the stored checksums, i have to use the xsum script again?
But if a file is corrupted, the checksum also will be updated?
Best regards
Christian
- db.diff -- this is the start of some db-accessing code for rsync
that
can be used to store/access/check checksums (supports sqlite and
mysql at present). This is the method I like the best, but the code
is in an early state that needs more work.
..wayne..
--
Please use reply-all for most replies to avoid omitting the mailing list.
To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync
Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
