On Mon, Nov 23, 2009 at 3:32 PM, Dan Drake <dr...@kaist.edu> wrote:
> On Mon, 23 Nov 2009 at 11:24AM -0600, Jason Grout wrote:
>> What if we just keep build directories on sage.math?  Then people can
>> use rsync to update their binary installations, which is an "intelligent
>> binary diff program providing compressed differentials".
>>
>> So we can just have a directory sagemath.org/SUSE-binary-installation/
>> that is a direct copy of the build directory on the SUSE virtual
>> machine.  To update, people would just use rsync to update their local
>> copy with that directory.
>
> A compromise between "tarball on a webserver" and "rsync server" is
> zsync: http://zsync.moria.org.uk/
>
> "zsync is a file transfer program. It allows you to download a file from
> a remote server, where you have a copy of an older version of the file
> on your computer already. zsync downloads only the new parts of the
> file. It uses the same algorithm as rsync. However, where rsync is
> designed for synchronising data from one computer to another within an
> organisation, zsync is designed for file distribution, with one file on
> a server to be distributed to thousands of downloaders."
>
> It seems like it would work really well, except that it would require
> people to keep their old downloads; to efficiently upgrade to, say,
> 4.2.1, you would need the tarball from downloading 4.2.
>
> It seems like a reasonable mix of regular file downloads and rsync.
>
> Dan

So, I think this is all a great idea!     To make it happen though,
somebody (not me) has to volunteer to bust their 'arse and make it
happen.

 -- William

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