Hadoop HA 是什么？架构？

https://blog.youkuaiyun.com/weixin_39915358/article/details/80216366

HA集群概念：https://blog.youkuaiyun.com/xxj123go/article/details/72828908

hadoop-2.X HA的基本原理：https://blog.youkuaiyun.com/pfnie/article/details/52433522

Hadoop： https://blog.youkuaiyun.com/a6225301/article/details/24305455

https://blog.youkuaiyun.com/qq_35078688/article/details/82925968

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Hadoop HA机制：https://blog.youkuaiyun.com/lb812913059/article/details/79718483

Hadoop-2.8.0之分布式集群（HA架构）搭建：https://blog.youkuaiyun.com/mmd0308/article/details/75332750

ubuntu10.0下Hadoop伪分布模式安装笔记：https://blog.youkuaiyun.com/WLLASTYBZ1314/article/details/38339531

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hadoop学习：https://blog.youkuaiyun.com/a5582ddff/article/details/80497165