What is check pointing in Hadoop?

Sharad Jaiswal
Sharad Jaiswal

Posted On: Feb 22, 2018

 

Check pointing is a fundamental part of keeping up and holding on file system metadata in HDFS. It’s urgent for proficient Name-Node recovery and restart, and is a vital indicator of general cluster health. However, check pointing can also because of confusion for operators of Apache Hadoop clusters. Check pointing is a procedure that takes a fsimage and alters log and compacts them into another fsimage. Along these lines, rather than replaying a possibly unbounded alter log, the NameNode can load the final in-memory state straightforwardly from the fsimage.

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