I just updated from 11.04 to Ubuntu 12.04 by doing a fresh install.
I installed apt-cacher-ng and notice something strange about it. It's always downloading an index file (Packages.gz) even though the file exists in the apt-cacher-ng's cache.
This is what exactly happened :
On Ubuntu 10.10 & 11.04
- apt-cacher-ng installed & configured on my laptop, then I reload and install some packages
- After that I configure my friend's laptop with apt-cacher-ng proxy (192.168.1.1:3142), reloading repository was blazingly fast, finished in a second without using my Internet connection (checked on system monitor, total Received just 15kB)
On Ubuntu 11.10 & 12.04
- apt-cacher-ng installed and configured on my laptop, then I reload and install some packages
- After that I configure my friend's laptop with apt-cacher-ng proxy (192.168.1.1:3142), reloading repository was really slow!, apt-cacher-ng redownload the index file from the Internet.