What Is Heartbeat in Hadoop?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

标签: Data Engineer

参考答案摘要

A heartbeat in Hadoop is a signal sent from the Datanode to the Namenode, indicating it is alive. In HDFS, the lack of a heartbeat signals a problem, and the Namenode and Datanode cannot do any comput...

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