HDFS - EditLog (transaction log)


The NameNode uses a transaction log called the EditLog to persistently record every change that occurs to file system metadata.


The NameNode to insert a record into the EditLog when

  • a new file is created
  • the replication factor of a file is changed


Offline Edits Viewer

Offline Edits Viewer is a tool to parse the Edits log file.


The NameNode uses a file in its local host OS file system to store the EditLog.

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