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From "Siddharth Wagle (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-4032) Ability to schedule a recurring request execution of an Action/Command
Date Tue, 10 Dec 2013 17:46:07 GMT
Siddharth Wagle created AMBARI-4032:
---------------------------------------

             Summary: Ability to schedule a recurring request execution of an Action/Command
                 Key: AMBARI-4032
                 URL: https://issues.apache.org/jira/browse/AMBARI-4032
             Project: Ambari
          Issue Type: New Feature
          Components: controller
    Affects Versions: 1.5.0
            Reporter: Siddharth Wagle
            Assignee: Siddharth Wagle
             Fix For: 1.5.0


*Definitions*
_Request Schedule Resource_

A request schedule resource captures all the information required to create a request for
executing a “Custom Action” or a “Custom Command” or a “First Class Command: (Start,
Stop, Restart)” with a recurring schedule or a point in time execution if no schedule is
specified.

*Scenarios to support*

1. _Rolling restart of Host Components / Service components_

Restart services with zero/minimal downtime for upgrades or configuration changes. You can
do a rolling restart on individual services (HDFS, MapReduce, HBase, ZooKeeper, etc). Rolling
restart also lets you choose which service components (Namenode, etc.) to restart.

2. _Rebalancer_

Rebalancer is a sample of a custom action that can be executed to initiate HDFS block rebalance.
This could be a one time task or a recurring task (e.g. rebalance once each week at a specific
time).





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