A small group of us have been working on mod_spdy, an open source filter module that provides support for the SPDY protocol in Apache.
SPDY is an experimental protocol described here http://dev.chromium.org/spdy/spdy-whitepaper. It's currently supported in the Chromium browser (Google Chrome) and there are a few other experimental implementations out there as well. If you're interested in contributing or giving us feedback, we welcome code contributions or suggestions! You can browse the code and learn more here: http://code.google.com/p/mod-spdy/ One of the challenges we're facing now stems from the fact that SPDY is a multiplexed protocol. Because it's multiplexed, it benefits from processing multiple concurrent requests on a single connection. I know that Apache doesn't currently support processing multiple requests on a single connection (HTTP is for the most part a serialized protocol so there's not a good reason to support concurrent request processing when dealing with HTTP), so we're exploring ways we might be able to do this within Apache. I'm wondering if there are existing modules or projects that have tried to solve this problem or a similar problem in Apache already, and if so, how they were able to multiplex requests. We've written up a document describing our current ideas for multiplexing here: http://code.google.com/p/mod-spdy/wiki/MultiplexIdeas but we could really use feedback from Apache developers on the best way to go about this. Thanks! -Bryan
