Hyperdex宣称全面超越Redis和mongoDB
   Hyperdex（http://hyperdex.org/performance/）的性能全面超越Redis和mongoDB,正打算在公司项目中使用，不知道有没有朋友实际应用的经验，欢迎交流。
   以上是摘自其网站的特性介绍：

• Fast HyperDex has lower latency and higher throughput than most other key-value stores.
• Searchable HyperDex enables lookups of non-primary data attributes. Such searches are implemented efficiently and contact a small number of servers.
• Scalable HyperDex scales as more machines are added to the system.
• Consistent The value you GET is always the latest value you PUT. Not just "eventually," but immediately and always.
• Fault tolerant HyperDex handles failures. Data is automatically replicated on multiple machines so that failures do not cause data loss.