Question - What are the three running modes of Hadoop?
Answer -
The three running modes of Hadoop are as follows:
i. Standalone or local: This is the default mode and does not need any configuration. In this mode, all the following components of Hadoop uses local file system and runs on a single JVM –
- NameNode
- DataNode
- ResourceManager
- NodeManager
ii. Pseudo-distributed: In this mode, all the master and slave Hadoop services are deployed and executed on a single node.
iii. Fully distributed: In this mode, Hadoop master and slave services are deployed and executed on separate nodes.