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Configuring Fault Tolerance

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Configuring Fault Tolerance
High Availability on Non-Ambari Clusters
Data Protection

Back Up HDFS Metadata

You can back up HDFS metadata without taking down either HDFS or the NameNodes.

Prepare to Back Up the HDFS Metadata
Regardless of the solution, a full, up-to-date continuous backup of the namespace is not possible. Some of the most recent data is always lost. HDFS is not an Online Transaction Processing (OLTP) system. Most data can be easily recreated if you re-run Extract, Transform, Load (ETL) or processing jobs.
Perform a Backup of the HDFS Metadata
You can back up HDFS metadata without affecting the availability of NameNode.

Parent topic: Backing Up HDFS Metadata

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