如何为apache drill编写自定义存储插件

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我的数据采用适当的格式，没有Apache支持的数据。 是否有关于如何编写自己的存储插件来处理此类数据的教程。

I have my data in a propriety format, None of the ones supported by Apache drill. Are there any tutorial on how to write my own storage plugin to handle such data.

推荐答案

这应该是文档中的内容，但目前不是。界面不是太复杂，但是看一下现有的插件并理解正在发生的一切可能有点多了。

This is something that really should be in the docs but currently is not. The interface isn't too complicated, but it can be a bit much to look at one of the existing plugins and understand everything that is going on.

有两个主要的编写存储插件的组件，将信息暴露给查询计划器和模式管理系统，然后实际实现从数据源API到钻取记录表示的转换。

There are 2 major components to writing a storage plugin, exposing information to the query planner and schema management system and then actually implementing the translation from the datasource API to the drill record representation.

Kudu插件最近被添加，并且是一个合理的存储系统模型，具有许多可以利用的元素。我要注意的一件事是，如果您的存储系统没有分发，并且您只是计划进行所有远程读取，则不必在组扫描中对关联性/工作列表/分配进行太多工作。如果我有一段时间不久，我将尝试在界面的不同部分编写一个文档，并编写一个关于现有插件的教程。

The Kudu plugin was added recently and is a reasonable model for a storage system with a lot of the elements Drill can take advantage of. One thing I would note is that if your storage system is not distributed and you just plan on making all remote reads you don't have to do as much work around affinities/work lists/assignments in the group scan. If I have some time soon I'll try to write up a doc on the different parts of the interface and maybe write a tutorial about one of the existing plugins.

https：// github / apache / drill / tree / master / contrib / storage-kudu / src / main / java / org / apache / drill / exec / store / kudu