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Posted to dev@hive.apache.org by "Brock Noland (JIRA)" <ji...@apache.org> on 2014/12/17 23:44:13 UTC

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

Brock Noland created HIVE-9153:
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             Summary: 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


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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