You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@hive.apache.org by "Janaki Lahorani (JIRA)" <ji...@apache.org> on 2018/03/01 19:54:00 UTC

[jira] [Assigned] (HIVE-18512) Get Results ReadAhead

     [ https://issues.apache.org/jira/browse/HIVE-18512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Janaki Lahorani reassigned HIVE-18512:
--------------------------------------

    Assignee: Janaki Lahorani

> Get Results ReadAhead
> ---------------------
>
>                 Key: HIVE-18512
>                 URL: https://issues.apache.org/jira/browse/HIVE-18512
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: BELUGA BEHR
>            Assignee: Janaki Lahorani
>            Priority: Minor
>
> I don't have any data to back this up, but I wanted to put it on the radar.
> It may be possible to improve performance of HS2 with an HDFS read-ahead reader for result data.  This would require adding a cache (configurable size) to the Driver/Context object and adding a separate thread for loading results asynchronously while the client is processing its current batch of results.  It seems that currently, results are loaded on demand.
> https://github.com/apache/hive/blob/6d890faf22fd1ede3658a5eed097476eab3c67e9/ql/src/java/org/apache/hadoop/hive/ql/Driver.java#L2298



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)