We currently deploy our app code to around 50 nodes using capistrano. We use the "copy" deployment method, ie. the code is checked out of svn onto the local deployment node, rolled into a tarball, then copied out to each target node where it is unrolled into a release dir before the final symlink is put in place.
As you might imagine, copying to 50 nodes generates quite a bit of traffic, and it takes ~5 mins to do a full deploy.
I was reading this interesting link today; one bullet in particular jumped out at me:
- "… the few hundred MB binary gets rapidly pushed bia [sic] bit torrent."
Now that's an interesting idea – I wonder if I can knock up something in capistrano that deploys using bittorrent?