Get yourself some super fast storage with Squid. Content Filtering for a large set of users can send your caching for a toss. How many users are you doing filtering usnig the squid filters.
I once had a nightmare with my 500+ users and a caching-content filtering setup. Have given up on caching-content with an single intel box. Using Cache heirarchies may be a better idea. Lemme know pls.
Trevor
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