Time Series Databases
KairosDB是一个快速可靠的分布式时间序列数据库，主要用Cassandra来做底层存储，也可以使用H2。KairosDB是在OpenTSDB基础上重写的。
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data. Cassandra’s support for replicating across multiple datacenters is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages.
译文：当您需要可伸缩性和高可用性而又不影响性能时，Apache Cassandra数据库是正确的选择。线性可扩展性和在商品硬件或云基础设施上经验证的容错性使