May 2017
Beginner to intermediate
596 pages
15h 2m
English
Content preview from Data Lake for Enterprises
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
The secondary NameNode Server
This component is used for snapshotting of the in-memory state of a Hadoop cluster and to keep track of write-ahead logs and transactional attributes. It is often used to replicate the cluster state. This is not a backup node for the NameNode server, but is for snapshotting purposes.