[HDFS-9214] Support reconfiguring dfs.datanode.balance.max.concurrent.moves without DN restart

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: datanode
• Hadoop Flags: Reviewed

Release Note

Steps to reconfigure:
1. change value of the parameter in corresponding xml configuration file
2. to reconfigure, run
    hdfs dfsadmin -reconfig datanode <dn_addr>:<ipc_port> start
3. repeat step 2 until all DNs are reconfigured
4. to check status of the most recent reconfigure operation, run
    hdfs dfsadmin -reconfig datanode <dn_addr>:<ipc_port> status
5. to query a list reconfigurable properties on DN, run
    hdfs dfsadmin -reconfig datanode <dn_addr>:<ipc_port> properties

• Assignee: Xiaobing Zhou
• Reporter: Xiaobing Zhou
• Created: 08/Oct/15 21:32
• Updated: 30/Aug/16 01:25
• Resolved: 04/Dec/15 22:49

Description

This is to reconfigure

dfs.datanode.balance.max.concurrent.moves

without restarting DN.

Issue Links

• is related to: HDFS-9140 Discover conf parameters that need no DataNode restart to make changes effective