[Smartfrog-checkins] [Smartfrog.org-JIRA] Created: (SFOS-967) Implement workflow component to decomission a datanode, with tests

[Steve L. (JIRA) <ji...@sm...>]

Implement workflow component to decomission a datanode, with tests
------------------------------------------------------------------

                 Key: SFOS-967
                 URL: http://jira.smartfrog.org/jira/browse/SFOS-967
             Project: SmartFrog
          Issue Type: New Feature
          Components: _service_hadoop
            Reporter: Steve Loughran
            Assignee: Steve Loughran
             Fix For: 3.12.x


when a datanode is terminated, all its data is unreachable; it is the equivalent of a node crashing.

When a datanode is decommissioned, the namenode needs to know about it; it needs to pull the data off onto different nodes for a clean shutdown. We should provide workflow components to do this. 

There is also the option of having a node do a clean shutdown when terminated. Here the termination time would be long -the time to move off all data-, and it could fail partway through. This is why a separate decommision operation would seem better

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://jira.smartfrog.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira