Re: ..weeding out bad debs off mirrors, was: Can I get some help, please?

On 5/25/07, Carlos Carvalho <carlos@fisica.ufpr.br> wrote:

Arnt Karlsen (arnt@c2i.net) wrote on 22 May 2007 14:54:
>On Tue, 22 May 2007 07:01:39 +0200, Klaus wrote in message
><46527933.6020207@gmx.de>:
>
>> Arnt Karlsen wrote:
>> > ..one thing I haven't found, is an easy way to weed out bad files off
>> > my (big bad disk, replacement ordered) mirror after fsck's, my plan is
>> > use md5sum down the debian/tree and weed out all the bad files, instead
>> > of wasting another week re-downloading all the good stuff (right now
>> > I have 71GB of i386 and source) to build a full mirror. Pointers?
>>
>> Isn't that what debmirror does anyhow to verify the integrity of the mirror?
>>
>> At least I seem to remember that bad or missing files were fixed with the next remirror of my mirror.
>>
>> Cheers,
>> Klaus
>>
>On Tue, 22 May 2007 08:25:38 +0100, Jonathan wrote in message
><cf3b996d0705220025lda0a341xa273204c1e16519c@mail.gmail.com >:
>
>> doesn't rsyncing take care fo this by itself updating the mirror?
>>
>> mirror.ac3bf1.org
>> John
>
>..IME no (but I use the anonftpsync script), as long as the file names
>matches, all files are accepted as good, I see no md5sum kinda check
>done. I appreciate the "do not dump that load upstream", so I'm looking
>for some kinda find *.md5sum* ->xarg md5sum-c -> rm -vf baaad.debs
>oneliner or somesuch to verify my mirror update, pointers?

rsync will check the integrity of existing files if used with option -c.
However this puts a high load on the server so many of them disable
its use. A debian mirror does not need to allow it.

The default is to not use -c; in this case only the date and length
are used to decide if a file should be updated.

One can use the checksums in indices/md5sums.gz to verify the files
locally. Very useful indeed... I do it periodically, because a mirror
is a significant responsibility.

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