Final answer:
Multiple Daemon processes run on a Hadoop system, including NameNode, Secondary NameNode, DataNode, ResourceManager, NodeManager, and JobHistoryServer.
Step-by-step explanation:
On a Hadoop system, there can be multiple Daemon processes that run to manage various aspects of the system.
These Daemons include:
- NameNode: Manages metadata and keeps track of the file system hierarchy.
- Secondary NameNode: Assists the NameNode in performing periodic checkpoints.
- DataNode: Stores the actual data on the disk.
- ResourceManager: Manages resources (CPU, memory) for applications running on the Hadoop cluster.
- NodeManager: Manages resources (CPU, memory) on individual cluster nodes.
- JobHistoryServer: Tracks completed jobs and provides information about them.
The number of Daemon processes running on a Hadoop system depends on the specific configuration and requirements of the system.