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potatoes's Issues

df或ds的stage划分问题

老师,最早使用RDD写Spark的程序时,可以明确的推算出具体哪个算子属于哪个Job的哪个Stage,在遇到一些异常或性能问题的时候,也可以很轻松找到具体是哪一部分代码的问题。
但是使用了DafaFrame或DataSet,以及写SQL的情况下,因为有各种优化及代码生成,导致实际上的stage划分让人很懵逼,对于这个问题,您怎么看?

下一部是源码精进,请问要如何开始

老师的课很不错,读了好几遍了,还做了分享。

下一部想进一步深入源码,请问老师要怎么精进呢?

如果老师还想开一门课,建议是源码课。

但这个过程会有点长,或者老师能先给我们拎一下,把28节课每节课要看的源码给我们先说一下吗?

机器学习需要掌握的技能

想请教下老师,在机器学习方向,对 Spark 源码,计算机原理,数据结构与算法,计算机网络这类常用的工程类知识有要求么?还是只需要掌握相关数学知识,并拥有一定的工程能力即可?

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