Hadoop Administration: Admin Command to merge fsimage and edits log Hadoop Administration: Admin Command to merge fsimage and edits log hadoop hadoop

Hadoop Administration: Admin Command to merge fsimage and edits log


Yes, the command usage to save the Namespace is

hdfs dfsadmin -saveNamespace

This command would save the namespace image (from memory) directly to disk which is faster than rolling and merging of edits with the fsimage stored in disk.

Before saving Namespace, make sure the safemode is turned ON.

hdfs dfsadmin -safemode enter

Namenode restart is not required to save namespace.