How to import a Checkpoint in Hadoop?

Question

How do you import a checkpoint in Hadoop?

Answer 1

In Hadoop, we can import the most recent checkpoint to the NameNode if the copies of the image and edit files are missing. This is the procedure:

• First, create an an empty directory and specify it in the dfs.namenode.name.dir config variable.
• Assign the location of the checkpoint directory to the dfs.namenode.checkpoint.dir configuration variable.
• After that, start the Namenode with the option, -importCheckpoint option.

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