i planning to implement jboss cache in my application running in jboss soa-p 5.0.0. We have basically identified 2 logical categories of datas to be cached.

question1:

should i plan to use each category as nodes or separate cache ? let me know when to choose node or  separate cache?

quesiton2:

Most imp requirement is i store datas in key,value pair inside the node's map and i want them to key+data to expire at cetain LRU policy(say 2hrs)  ? let me know how to design this ?