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From "Jeongdae Kim (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-3536) Remove creating unnecessary phoenix connections in MR Tasks of Hive
Date Thu, 15 Dec 2016 09:10:58 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-3536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeongdae Kim updated PHOENIX-3536:
----------------------------------
    Attachment: PHOENIX-3536.patch

> Remove creating unnecessary phoenix connections in MR Tasks of Hive
> -------------------------------------------------------------------
>
>                 Key: PHOENIX-3536
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3536
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Jeongdae Kim
>            Assignee: Jeongdae Kim
>              Labels: HivePhoenix
>         Attachments: PHOENIX-3536.patch
>
>
> PhoenixStorageHandler creates phoenix connections to make QueryPlan in getSplit phase(prepare
MR) and getRecordReader phase(Map) while running MR Job.
> in phoenix, it spends too many times to create the first phoenix connection(QueryServices)
for specific URL. (checking and loading phoenix schema information)
> i found it is possible to remove creating query plan again in Map phase(getRecordReader())
by serializing QueryPlan created from Input format ans passing this plan to record reader.

>  this approach improves scan performance by removing trying to unnecessary connection
in map phase.



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