Xiaobing Zhou created HDFS-9550:
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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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