web services - Options for In-memory databases (Open source and Java-based) -

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i've web app makes external web service calls on behalf of it's clients. want cache data returns web services in web app other clients can reuse data , run filters , queries on cached data.

the current architecture of web app uses apache camel, spring , jetty. i'm looking options (pros/cons) of in-memory database options.

hazelcast (java api) - can distribute in-memory datagrid (with map, multimap, sets, lists, queues, topics) on multiple nodes & use load/store interface implementation disk based db. can similar ehcache.

redis option (use java client access it). can configure conf file write data disk (or avoid altogether) & should not have write own load/store classes.

besides these, there number of options use. not sure if looking @ open source options, looking @ distributed options or not.
hope helps.


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