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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-833) Storage access layer
Date Wed, 29 Jul 2009 02:56:14 GMT

    [ https://issues.apache.org/jira/browse/PIG-833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12736424#action_12736424
] 

Raghu Angadi commented on PIG-833:
----------------------------------


Will surely look at Hive's storage layer and SerDe. I will be able to better comment on specifics
 once I get better handle. In the mean while I will attach the work that is already been done
on Zebra. 

This is currently a contrib in PIG. Based on these experiences we could probably provide a
common storage layer more widely suitable for multiple Hadoop related projects.

> Storage access layer
> --------------------
>
>                 Key: PIG-833
>                 URL: https://issues.apache.org/jira/browse/PIG-833
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Jay Tang
>         Attachments: hadoop20.jar.bz2
>
>
> A layer is needed to provide a high level data access abstraction and a tabular view
of data in Hadoop, and could free Pig users from implementing their own data storage/retrieval
code.  This layer should also include a columnar storage format in order to provide fast data
projection, CPU/space-efficient data serialization, and a schema language to manage physical
storage metadata.  Eventually it could also support predicate pushdown for further performance
improvement.  Initially, this layer could be a contrib project in Pig and become a hadoop
subproject later on.

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