This section explains the user accounts for installing, running, and maintaining this product.
User type | User name | Description |
|---|---|---|
System administrator | root | System administrator with root permissions (superuser) Installs and maintains this product, and starts and stops Hadoop. |
MapReduce executing user | mapred (fixed) | Executes JobTracker and TaskTracker processes. |
Hadoop user | Optional | Executes, stops, and displays status of Hadoop jobs (job executing user) |
Make the following design decisions in order to operate this product.
You can register more than one user account for the Hadoop user.
You can register Hadoop users by specifying the user accounts and groups that users belong to when installing and setting up this product.
Check the anticipated Hadoop users (user names and user IDs) beforehand.
See
Refer to "11.1 Adding Job Execution Users" for information on how to manage Hadoop users (job execution users).
