Hadoop Installation
Topics
- Hadoop operational modes
- Hadoop installation options
Hadoop Operational Modes
- Local (Standalone) operation
- All Hadoop deamons (NameNode, DataNode, JobTracker, Task Tracker) are running on a single Java process (JVM)
- Uses local file system for storage
- Pseudo-distributed operation (test & development)
- Each Hadoop daemon runs in a separate Java process (JVM) but physically on a single machine
- Fully-distributed operation (production)
- Each Hadoop daemon runs on a different machine
- The power of Hadoop – parallel processing, scalability, automatic replication management, fault-tolerance, data consistency, workflow management – gets realized only in this mode
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