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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-546) Use Zookeeper in HBase
Date Thu, 12 Jun 2008 15:16:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12604536#action_12604536
] 

Jean-Daniel Cryans commented on HBASE-546:
------------------------------------------

In Bigtable paper, page 4, it describes what Chubby is used for exactly :

- Ensure there is at most 1 active master at any time
- Store the bootstrap location
- Discover tablet servers and finalize tabler server death
- Store the schema information
- Store access control lists (not sure what it is)

Ze big question : do we want to implement all of these or just some parts? For example, what
would be the benefit of storing all schema information in ZK instead of what we do right now?


> Use Zookeeper in HBase
> ----------------------
>
>                 Key: HBASE-546
>                 URL: https://issues.apache.org/jira/browse/HBASE-546
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Bryan Duxbury
>            Priority: Trivial
>         Attachments: zookeeper-config.patch
>
>
> Zookeeper =~ Chubby. This means that we could take advantage of a distributed lock manager
to coordinate things like failover masters, regionservers staying online when master is dead,
atomic region->regionserver assignments, etc. There are a lot of opportunities for improvements
here. Please add discussions of particular features in comments or sub-tasks.

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