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From Jim Kellerman <...@powerset.com>
Subject RE: [jira] Commented: (HBASE-546) Use Zookeeper in HBase
Date Thu, 12 Jun 2008 16:17:43 GMT
> 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?

Currently the schema is stored in every row of the meta. Multiple copies = wasted space. Also,
it would make schema changes/queries easier:
- does a table exist?
- create/delete, enable/disable table
- add/remove/modify column

See HBASE-451
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