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https://issues.apache.org/jira/browse/HDFS-10813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15450640#comment-15450640
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Yiqun Lin commented on HDFS-10813:
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Thanks [~anu] for the review.
{quote}
could you please file a document JIRA that explains how this feature works.
Since the change is the CLI it is good to have the documentation updated too.
{quote}
I am some confused here, I just add one utility method in {{Command}} and I
haven't changed the current CLI. Right? In addition, I will file some JIRAS for
supporting multiple specified nodes for {{hdfs diskbalancer -report -node}} or
other commands.
Correct me if I am wrong.
Thanks.
> DiskBalancer: Add the getNodeList method in Command
> ---------------------------------------------------
>
> Key: HDFS-10813
> URL: https://issues.apache.org/jira/browse/HDFS-10813
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: balancer & mover
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Priority: Minor
> Fix For: 2.9.0
>
> Attachments: HDFS-10813.001.patch
>
>
> The method {{Command#getNodeList}} in DiskBalancer was added in HDFS-9545,
> but it's never used. We can improve that in the following aspects:
> 1.Change {{private}} to {{protected}} so that the subclass can use that
> method in the future.
> 2.Reuse the method {{Command#getNodeList}} and to construct a new method
> like this {{List<DiskBalancerDataNode> getNodes(String listArg)}}. This
> method can be used for getting multiple nodes in the future. For example, if
> we want to use {{hdfs diskbalancer -report -node}} or {{hdfs diskbalancer
> -plan}} with multiple specified nodes, that method can be used. Now these
> commands only support one node.
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