RethinkDB 2.1.3 发布，分布式数据库
欢迎加入运维网交流群:263444886RethinkDB 2.1.3 发布，此版本是个 bug 修复版本。
更新内容如下：
兼容性
[*] RethinkDB 2.1.3 servers cannot be mixed with servers running RethinkDB 2.1.1 or earlierin the same cluster
Bug 修复
[*] Fixed a data corruption bug in the b-tree implementation (#4769)
[*] Fixed the ssl option in the JavaScript driver (#4786)
[*] Made the Ruby driver compatible with Ruby on Rails 3.2 (#4753)
[*] Added the backports.ssl_match_hostname library to the Python driver package (#4683)
[*] Changed the update check to use an encrypted https connection (#3988, #4643)
[*] Fixed access to https sources in r.http on OS X (#3112)
[*] Fixed an Unexpected exception error (#4758)
[*] Fixed a Guarantee failed: crash that could occur during resharding(#4774)
[*] Fixed a bug that caused some queries to not report an error when interrupted (#4762)
[*] Added a new "_debug_recommit" recovery option to emergency_repair (#4720)
[*] Made error reporting in the Python driver compatible with celery and nose (#4764)
[*] Changed the handling of outdated indexes from RethinkDB 1.13 during an import to nolonger terminate the server (#4766)
性能提升
[*] Improved the latency when reading from a system table in r.db('rethinkdb') while theserver is under load (#4773)
[*] Improved the parallelism of JSON encoding on the server to utilize multiple CPU cores
[*] Refactored JSON decoding in the Python driver to allow the use of custom JSON parsersand to speed up pseudo type conversion (#4585)
[*] Improved the prefetching logic in the Python driver to increase the throughput ofcursors
[*] Changed the Python driver to use a more efficient data structure to store cursorresults (#4782)
下载：https://github.com/rethinkdb/rethinkdb/archive/v2.1.3.zip
RethinkDB 设计用来存储 JSON 文档的分布式数据库，可通过简单操作实现多机分布式存储。支持表的联合和分组查询。
特点：
简单编程模型
[*] JSON 数据模型和一致性
[*] 分布式联合查询、子查询、聚合查询和原子更新操作
[*] Hadoop 风格的 map/reduce.
轻松管理
[*] 提供友好的 Web 和命令行管理工具
[*] 服务器和网络故障时的谨慎处理
[*] 多数据中心复制和故障转移
水平伸缩
[*] 数据分片和复制到多个节点
[*] 自动化并行查询和分布式查询
[*] 通过 MVCC 并发实现无锁操作
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