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Posted to dev@hive.apache.org by "Rui Li (JIRA)" <ji...@apache.org> on 2014/12/18 04:18:14 UTC

[jira] [Assigned] (HIVE-9153) Evaluate CombineHiveInputFormat versus HiveInputFormat [Spark Branch]

     [ https://issues.apache.org/jira/browse/HIVE-9153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rui Li reassigned HIVE-9153:
----------------------------

    Assignee: Rui Li

> Evaluate CombineHiveInputFormat versus HiveInputFormat [Spark Branch]
> ---------------------------------------------------------------------
>
>                 Key: HIVE-9153
>                 URL: https://issues.apache.org/jira/browse/HIVE-9153
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Brock Noland
>            Assignee: Rui Li
>
> The default InputFormat is {{CombineHiveInputFormat}} and thus HOS uses this. However, Tez uses {{HiveInputFormat}}. Since tasks are relatively cheap in Spark, it might make sense for us to use {{HiveInputFormat}} as well. We should evaluate this on a query which has many input splits such as {{select count(*) from store_sales where something is not null}}.



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