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Posted to dev@tajo.apache.org by "JaeHwa Jung (JIRA)" <ji...@apache.org> on 2013/12/19 06:29:09 UTC
[jira] [Created] (TAJO-433) Improve integration with Hive
JaeHwa Jung created TAJO-433:
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Summary: Improve integration with Hive
Key: TAJO-433
URL: https://issues.apache.org/jira/browse/TAJO-433
Project: Tajo
Issue Type: Sub-task
Components: catalog
Affects Versions: 0.8-incubating
Reporter: JaeHwa Jung
Assignee: JaeHwa Jung
Fix For: 0.8-incubating
Hi, guys~
I wish to discuss about HCatalogStore. current Tajo uses HCatalog to integrate catalog with hive. So, users must run HiveMetaStoreServer because HCatalog connect HiveMetaStoreServer.
But at this point, it needs to make improvements.
- First is HiveMetaStoreServer. if it can fall down or it performance bottlenecks, it will be a fatal problem for Tajo.
- Second is HCatalog API. It doesn't provide API for DDL. So, Tajo use HCatalog API and HiveMetaStoreClient API.
So, I wish to remove HiveMetaStoreServer dependency and integrate catalog with Hive using HiveMetaStoreClient. And I wish to use HiveMetaStoreClient API instead of HCatalog API. I already checked HiveMetaStoreClient to connect HiveMetaStore without HiveMetaStoreServer.
if HiveMetaStoreClient can't connect HiveMetaStore, Tajo try to connect HiveMetaStoreServer as backup policy.
What do you think about this suggestion? :)
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