Hi, As far as I know, SquidGuard uses Berkeley DB (which is based on BTree and Hash tables) for storing the urls and domains to be blocked. But I need to store a huge amount of domains (about 7 millions) which are to be blocked. Moreover, the search time to check if the domain is there in the block list, has to be less than a microsecond. So, Will Berkeley DB serve the purpose? I can search for a domain using PATRICIA Trie in less than 0.1 microseconds. So, if Berkeley Trie is not good enough, how can I use the Patricia Trie instead of Berkeley DB in Squid to block the url. -- View this message in context: http://www.nabble.com/Access-control-%3A-How-to-block-a-very-large-number-of-domains-tp24041263p24041263.html Sent from the Squid - Users mailing list archive at Nabble.com.