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From "Brock Noland (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9153) Evaluate CombineHiveInputFormat versus HiveInputFormat [Spark Branch]
Date Thu, 18 Dec 2014 03:23:13 GMT

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

Brock Noland updated HIVE-9153:
-------------------------------
    Description: 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}}.
 (was: 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}}.)

> 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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