We are looking to use Membase/Memcached to replace our Jboss Cache as we are having constant issues with it. One thing that Jboss cache has that I cannot find documented anywhere in Membase/Memcached is eviction policies. In our jboss cache we have two different "buckets" configured...one that if a node is idle for X minutes, it is automatically removed...the other is if a node is older than X minutes it gets removed automatically. Does Membase/Memcached have this and if not how are people accomplishing this? Our goal is to prevent stale data in the cache.