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From "Xiaobing Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9550) DiskBalancer: Add Run Command
Date Fri, 11 Dec 2015 22:18:46 GMT
Xiaobing Zhou created HDFS-9550:

             Summary: DiskBalancer: Add Run Command
                 Key: HDFS-9550
                 URL: https://issues.apache.org/jira/browse/HDFS-9550
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: balancer & mover
    Affects Versions: 2.8.0
            Reporter: Xiaobing Zhou
            Assignee: Xiaobing Zhou

This is to propose being able to query all the nodes that we send various plans to. In order
to do the query, query command will talk to all involved data nodes through cluster interface(HDFS-9449)
and data models(HDFS-9420) and compare the hash tag that it gets back to make sure that the
plan is that we are interested in and print out the results.

As bonus, it should support the ability to print out the diff of what happened when a run
is complete. Assuming the state of the cluster is saved to file before.json. There should
be two kinds of diffs:
1. Overall what happened in the cluster vs. before.json -- just a summary 
2. for a specific node -- just like report command we should be able to pass in a node and
as see the changes against the before.json

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