[jira] [Commented] (ZOOKEEPER-1080) Provide a Leader Election framework based on Zookeeper receipe

["Krishna Sankar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044062#comment-13044062 ] 

Krishna Sankar commented on ZOOKEEPER-1080:
-------------------------------------------

Were you thinking of a class under recipes or something more fancier like a framework ? Most probably still needs to implement the pseudocode which has client and server piece. Thoughts ?

> Provide a Leader Election framework based on Zookeeper receipe
> --------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1080
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1080
>             Project: ZooKeeper
>          Issue Type: New Feature
>          Components: contrib
>    Affects Versions: 3.3.2
>            Reporter: Hari A V
>
> Currently Hadoop components such as NameNode and JobTracker are single point of failure.
> If Namenode or JobTracker goes down, there service will not be available until they are up and running again. If there was a Standby Namenode or JobTracker available and ready to serve when Active nodes go down, we could have reduced the service down time. Hadoop already provides a Standby Namenode implementation which is not fully a "hot" Standby. 
> The common problem to be addressed in any such Active-Standby cluster is Leader Election and Failure detection. This can be done using Zookeeper as mentioned in the Zookeeper recipes.
> http://zookeeper.apache.org/doc/r3.3.3/recipes.html
> +Leader Election Service (LES)+
> Any Node who wants to participate in Leader Election can use this service. They should start the service with required configurations. The service will notify the nodes whether they should be started as Active or Standby mode. Also they intimate any changes in the mode at runtime. All other complexities can be handled internally by the LES.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira