Chapter 6. Backup and Recovery
In this chapter, we will cover the following recipes:
Initiating Namenode
saveNamespace
Using HDFS Image Viewer
Fetching parameters which are in-effect
Configuring HDFS and YARN logs
Backing up and recovering Namenode
Configuring Secondary Namenode
Promoting Secondary Namenode to Primary
Namenode recovery
Namenode roll edits – Online mode
Namenode roll edits – Offline mode
Datanode recovery – Disk full
Configuring NFS gateway to serve HDFS
Recovering deleted files