What does Name-Node mean in Hadoop?

The Name-Node is the center part of an HDFS document framework. It keeps the directory tree of all records in the file system and tracks where over the cluster the document information is kept. It doesn’t store the information of these records itself. The Name-Node is a Single mode of Failure for the HDFS Cluster. HDFS isn’t as of now a High Availability structure. At the point when the Name-Node goes down, the document structure goes disconnected. There is another optional Secondary NameNode that can be facilitated on a different machine. It just makes checkpoints of the namespace by merging the edits document into the fsimage document and does not give any genuine repetition.