Chronos 是一个具备容错特性的作业调度器，可处理依赖性和基于 ISO8601 的调度。Chronos 是由 Airbnb 公司推出的用来替代 cron 的开源产品。你可以用它来对作业进行编排，支持使用 Mesos 作为作业执行器，支持和 Hadoop 进行交互。可定义作业执行完成后的触发器。支持任意长度的依赖链。
Chronos 2.1 发布了，主要改进内容包括：
值得注意的变化:
Two column layout, making advanced options hidden by default
Removed dependency graph button from job list per feedback from Airbnb
Defaulted epsilon to 30 minutes per feedback from Airbnb
Normalized lots of font sizes and weights to simplify styles
Rendered templates that required no interpolation as plain HTML, meaning the user sees something on the page faster than previously
Rendered initial job list with a single write to the DOM rather than one per list item. This drastically reduced DOM access with long lists and decreased rendering time.
主要实现的变化:
Removed all requests to Google’s font API in favor of a static stylesheet pointing to the public assets. This also removed a requirejs-plugin dependency, fewer JS files.
Upgraded Rivets from 0.4.5 to 0.4.9 and used the JS version instead of the CoffeeScript one to save unnecessary compilation
Reduced re-rendering that Rivets was handling
Delegated events in job list instead of adding listeners to each list item. This reduces the number of listeners required by dozens or hundreds with large lists.
Delegated tooltips in job list instead of adding listeners to each list item. This reduced tooltip listeners from 1-per-item to 1 for the whole list.
Bug 修复:
Deselecting the last job item previously forced a re-render of the entire list, which took a long time with a large list. That no longer happens.
Sorting the table would not render the correct arrow, depending on where the click occurred. The arrow now always represents the current sort order.
项目主页：https://github.com/airbnb/chronos
来自:开源中国社区
