Cool. That's reminds of an approach I took back in 2011 when implementing a Linux build / update system in a (small) bank. 8000 machines across hundreds of branches, no servers in the branches, no internet access, limited bandwidth. The goal was to wake one machine (WOL) which detects an update (via LDAP attribute) and then rsyncs repo update + torrent file. Once complete, that machine would load the torrent, verify the synced files, update it's version in LDAP and wake all of its peers. Each peer host would also query LDAP, detect the need to update, but also notice a peer with the latest version, so skip repo rsync and grab the torrent file and load it. So a branch with hundreds of hosts would torrent the repo update pretty quickly to each other. Pretty cool tbh, you could PXE boot and rebuild a bunch of hosts remotely, and once built, any one of them could act as an installation point. I even used this to do a distribution change, switching from SLES to Ubuntu.