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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10681) DiskBalancer: query command should report Plan file path apart from PlanID
Date Fri, 22 Jul 2016 17:50:20 GMT
Manoj Govindassamy created HDFS-10681:
-----------------------------------------

             Summary: DiskBalancer: query command should report Plan file path apart from
PlanID
                 Key: HDFS-10681
                 URL: https://issues.apache.org/jira/browse/HDFS-10681
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: diskbalancer
    Affects Versions: HDFS-1312
            Reporter: Manoj Govindassamy
            Priority: Minor


DiskBalancer query command currently reports planID (SHA512 hex) only. Currently ongoing disk
balancing activity in a datanode can be cancelled wither by planID + datanode_address or just
by pointing to the right plan file. Since there could be many plan files, to avoid ambiguity
its better if query command can report the plan file path also.

{noformat}
$ hdfs diskbalancer --help query 
usage: hdfs diskbalancer -query <hostname>  [options]
Query Plan queries a given data node about the current state of disk
balancer execution.
    --query <arg>   Queries the disk balancer status of a given datanode.
Query command retrievs *the plan ID* and the current running state.
{noformat}

Sample query command output:
{noformat}
16/06/20 15:42:16 INFO command.Command: Executing "query plan" command.
Plan ID: 04f41e2e1fa2d63558284be85155ea68154fb6ab435f1078c642d605d06626f176da16b321b35c99f1f6cd0cd77090c8743bb9a19190c4a01b5f8c51a515e240
Result: PLAN_UNDER_PROGRESS
or
16/06/20 15:46:09 INFO command.Command: Executing "query plan" command.
Plan ID: 04f41e2e1fa2d63558284be85155ea68154fb6ab435f1078c642d605d06626f176da16b321b35c99f1f6cd0cd77090c8743bb9a19190c4a01b5f8c51a515e240
Result: PLAN_DONE
{noformat}

Cancel command syntax:
{noformat}
$ hdfs diskbalancer --help cancel
*usage: hdfs diskbalancer -cancel <planFile> | -cancel <planID> -node
            <hostname>*
Cancel command cancels a running disk balancer operation.
    --cancel <arg>   Cancels a running plan using a plan file.
    --node <arg>     Cancels a running plan using a plan ID and hostName
Cancel command can be run via pointing to a plan file, or by reading the
plan ID using the query command and then using planID and hostname.
Examples of how to run this command are
hdfs diskbalancer -cancel <planfile>
hdfs diskbalancer -cancel <planID> -node <hostname>
{noformat}



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