Onyx 0.8.0 发布，此版本最主要是增加了自动化状态管理功能，恢复，Windowing 和触发器。状态会被记录在 BookKeeper 日志记录，segments 可以使用嵌入式 RocksDB 删除处理。开箱支持多个类型的聚合。
升级注意事项：
Onyx 0.8.0 不兼容之前的版本
改进列表：
Breaking change :onyx.messaging/peer-port-range and :onyx.messaging/peer-ports are deprecated in favour of a single :onyx.messaging/peer-port port. The Aeron layer multiplexed all communication over a single port so multiple port selection is longer required.
Important change: default task batch timeout was reduced from 1000ms to 50ms.
New major feature: Windowing and Triggers.
New feature: Fixed windows
New feature: Sliding windows
New feature: Session windows
New feature: Global windows
New feature: Timer triggers
New feature: Segment-based triggers
New feature: Watermark triggers
New feature: Percentile Watermark triggers
New feature: Punctuation triggers
New feature: Accumulating refinement mode
New feature: Discarding refinement mode
New feature: BookKeeper & embedded RocksDB automatic "exactly once" filtering.
New feature: friendlier error messages. Added custom schema error handlers to print out documentation and required types in a more customized format.
New flux policy: Recover
New lifecycle: after-read-batch
New metric: peer-send-bytes
Bug fix: fixed an issue where the percentage job scheduler would misallocate.
Bug fix: fixed :data key being removed from exception messages in the logs.
Onyx 是什么？
Onyx 是一个无中心、支持云、容错的分布式计算系统
使用 Clojure 编写
支持批处理和流处理混合
提供信息模型用于描述和构建分布式工作流
竞争对手： Storm, Cascading, Map/Reduce, Dryad, Apache Sqoop, Twitter Crane 等等
用途？
实时的事件流处理
连续计算
ETL
在 MapReduce 进行数据转换
数据清理
数据摄入和存储媒介传输
软件详情：http://michaeldrogalis.github.io/jekyll/update/2015/11/12/Onyx-0.8.0-Automatic-State-Management.html
下载地址：https://github.com/onyx-platform/onyx
来自:开源中国社区
