Comparison of memcache, redis and ehcache as distributed caching framework [closed]

Answer 1

A small feature comparison is here: http://toddrobinson.com/appfabric/appfabric-cache-feature-comparisons/

UPDATE 25.02.2016

Dead link fixed thanks to WebArchive.org: http://web.archive.org/web/20140205010302/http://toddrobinson.com/appfabric/appfabric-cache-feature-comparisons/