Mailinglist Archive: opensuse-factory (506 mails)

[Andreas Hanke <andreas.hanke@xxxxxxxxxxxxxx>]

Pascal Bleser schrieb:
>> What about md5sum-ming the filelist, and use the md5sum as key?  If a new 
>> version of a package is released with the same filelist only the md5sum needs 
>> to be transferred.  For big packages the compression might be around 100% ;)
> 
> Already done.

No, that's not what was asked for.

Just as an example for repomd:

You have a repository with package A-1 and B-1. createrepo writes the
filelists of both packages into filelists.xml.

Now A gets upgraded to A-1.1. Which is a great thing, because the
package manager has to download the whole filelists.xml again, even
though package B has not been touched at all.

What you describe covers only the fact that the metadata aren't
downloaded again if nothing changed. But if even the slightest thing
changed, everything is downloaded from scratch, even the parts that have
not been changed.

Solutions:

- Use a smarter protocol that can "fix" this design problem, e.g. rsync
instead of http/ftp.

- Think about a smarter metadata format. SUSE had one (the old
plain-text patchinfos) and threw it away in favour of repomd.

- Extend the repomd format to suck less, e.g. by splitting filelists.xml
into filelists-dec06.xml, filelists-jan07.xml, filelists-feb07.xml so
that at least the unchanged filelists from previous months aren't
downloaded over and over again.
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