zsync effortless file updater

[imbaczek]

this may be of interest for mod, map and tool (downloader) devs:

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. zsync requires no special server software ├óÔé¼ÔÇØ just a web server to host the files ├óÔé¼ÔÇØ and imposes no extra load on the server, making it ideal for large scale file distribution.

zsync is open source, distributed under version 2 of the Artistic License. Feedback, bugs reports and patches are welcome.

[det]

ZSync, like RSync, doesn't work very well with zip/7zip files. This is because both compression and file layout offsets in the zip file. The CA downloader system is a nice compromise in simplicity and effectiveness.

[Licho]

It might still be usefull to planned multiple engine version updating/support.

And it says it has special handling of compressed files (probably needs standard file extension on them)