[jira] [Updated] (HIVE-9153) Perf enhancement on CombineHiveInputFormat and HiveInputFormat

["Xuefu Zhang (JIRA)" <ji...@apache.org>]

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

Xuefu Zhang updated HIVE-9153:
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    Summary: Perf enhancement on CombineHiveInputFormat and HiveInputFormat  (was: Evaluate CombineHiveInputFormat versus HiveInputFormat)

> Perf enhancement on CombineHiveInputFormat and HiveInputFormat
> --------------------------------------------------------------
>
>                 Key: HIVE-9153
>                 URL: https://issues.apache.org/jira/browse/HIVE-9153
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Brock Noland
>            Assignee: Rui Li
>         Attachments: HIVE-9153.1-spark.patch, HIVE-9153.1-spark.patch, HIVE-9153.2.patch, HIVE-9153.3.patch, screenshot.PNG
>
>
> 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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