[HDFS-10821] DiskBalancer: Report command support with multiple nodes

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha2
• Component/s: balancer & mover
• Target Version/s: 3.0.0-alpha2
• Hadoop Flags: Reviewed
• Assignee: Yiqun Lin
• Reporter: Yiqun Lin
• Created: 31/Aug/16 11:38
• Updated: 22/Jan/17 12:50
• Resolved: 12/Sep/16 22:46

Description

Since HDFS-10813 has committed to the trunk, then we can use getNodes method to parse the nodes string and support multiple nodes with hdfs diskbalancer subcommands(ex -report, -query). In this JIRA, we are focusing on the subcommand -report.

That means we can use command hdfs diskbalancer -report -node to print one or one more datanodes report info. A test input command(here I use UUID to specify one datanode):

hdfs diskbalancer -report -node e05ade8e-fb28-42cf-9aa9-43e564c0ec99,38714337-84fb-4e35-9ea3-0bb47d6da700

Issue Links

• is related to: HDFS-11358 DiskBalancer: Report command supports reading nodes from host file