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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2011/02/04 19:30:30 UTC

[jira] Updated: (HIVE-1900) a mapper should be able to span multiple partitions

     [ https://issues.apache.org/jira/browse/HIVE-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Namit Jain updated HIVE-1900:
-----------------------------

    Attachment: hive.1900.1.patch

> a mapper should be able to span multiple partitions
> ---------------------------------------------------
>
>                 Key: HIVE-1900
>                 URL: https://issues.apache.org/jira/browse/HIVE-1900
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.1900.1.patch
>
>
> Currently, a  mapper only spans a single partition which creates a problem in the presence of many
> small partitions (which is becoming a common usecase in facebook).
> If the plan is the same, a mapper should be able to span files across multiple partitions

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