What is Cache Tagging?
caching, kohana, performance, php
Solution
Some cache implementations allow you to add one or more tags to any data item you store in the cache, and then find or delete all items with a given tag. This can be useful for a number of things, most significantly batch updates (you add a bunch of related stuff to the cache, tag it with a version string, and when you later learn that data from that version has become outdated, tell the cache to drop it all at once).
Problem
There is Cache_Tagging in Kohana but it does not explain what it is. Can anyone tell what Cache Tagging is supposed to do or when do we use it ?