I use Squid Proxy on my gateway, and just make sure all my boxes are set to use the same (local) mirror. As I upgrade manually, there are no race conditions to worry about and it works very well, assuming fairly relaxed size limits on the Squid Cache...
Posted Feb 20, 2009 9:36 UTC (Fri) by NightMonkey (subscriber, #23051)
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A solution for Gentoo I've used for years is "http-replicator". It hums along quietly, with nary a hiccup (except when I haven't cleaned the cache out in a while...). http://sourceforge.net/projects/http-replicator