Hadoop Operation Modes
Once you have downloaded Hadoop, you can operate your Hadoop cluster in one of the three supported modes:- Local/Standalone Mode : After downloading Hadoop in your system, by default, it is configured in a standalone mode and can be run as a single java process.
- Pseudo Distributed Mode : It is a distributed simulation on single machine. Each Hadoop daemon such as hdfs, yarn, MapReduce etc., will run as a separate java process. This mode is useful for development.
- Fully Distributed Mode : This mode is fully distributed with minimum two or more machines as a cluster. We will come across this mode in detail in the coming chapters.
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