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So far I've been using the default cachemanager provided by spring cache module. It is most suitable for small non distributed environments. When the systems grows JDK inmemory hash map will not be sufficient to server the demand. There are couple of alternatives available off the shelf for example Ehcahce, Memcached, Spring Gemfire. I've tried both ehcache and memcached they all works pretty well with spring cache abstraction thus there are couple of challenges remain with integration. More details about these framework integration can be found here.
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