hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-8844) Choose a persisent policy for RDD caching [Spark Branch]
Date Sat, 15 Nov 2014 17:07:33 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jimmy Xiang updated HIVE-8844:
------------------------------
    Attachment: HIVE-8844.3-spark.patch

Per Xuefu's suggestion, we'd better not to make it configurable for now since Hive has already
too many configurations. So attached patch v3.

> Choose a persisent policy for RDD caching [Spark Branch]
> --------------------------------------------------------
>
>                 Key: HIVE-8844
>                 URL: https://issues.apache.org/jira/browse/HIVE-8844
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Xuefu Zhang
>            Assignee: Jimmy Xiang
>             Fix For: spark-branch
>
>         Attachments: HIVE-8844.1-spark.patch, HIVE-8844.2-spark.patch, HIVE-8844.3-spark.patch
>
>
> RDD caching is used for performance reasons in some multi-insert queries. Currently,
we call RDD.cache(), which indicates a persistency policy of using memory only. We should
choose a better policy. I think memory+disk will be good enough. Refer to RDD.persist() for
more information.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message