My main confusion or concern with memcache is how to go about deleting a given set of keys in the cache. For instance, we probably have 10-15 pages on our site that hit the "articles" tables in our database. So, that right there would be 10-15 unique key/value pairs in memcache, assuming I store the query as the key, and the result set as the value. Now add on dynamic search strings, pagination, etc, and you've probably got 100 unique key/value pairs in memcache, all pertaining to articles.
So my question is, if we want to make sure our site is never stale, then we need to invalidate all 100 of those keys if someone inserts a new article. Now I'm thinking I need to do a search in my keys to find all article related keys and invalidate them. Is the best way to do this then to store ANOTHER key value pair which essentially stores all the article related keys as its value? So that I can quickly and easily invalidate the 100 other keys? It seems like this might be what "namespaces" are for, but I can't understand the example given on the memcached FAG page. Any help and direction in this area would be much appreciated, or any other good articles I should read that talk about best practices, implementation techniques, etc. thanks in advance. Jay
