hadoop Starting datanodes
时间: 2023-09-25 13:08:06 浏览: 64
When starting a Hadoop cluster, one of the critical steps is to start the datanodes. Datanodes are responsible for storing and managing the actual data in the Hadoop Distributed File System (HDFS).
To start the datanodes, you need to follow these steps:
1. Ensure that Hadoop is installed and configured correctly on all the nodes in the cluster.
2. Start the Hadoop daemons on the namenode machine by running the command `start-dfs.sh`.
3. Start the datanodes by running the command `start-dfs.sh datanode`.
4. Verify that the datanodes have started correctly by checking the logs and the Hadoop web interface.
Once the datanodes are up and running, they will begin to communicate with the namenode and start storing the data in the HDFS.