[
https://issues.apache.org/jira/browse/PIG-4709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Pallavi Rao updated PIG-4709:
-----------------------------
Attachment: PIG-4709.patch
Initial patch. Handles algebraic operations on grouped data. There are certain
cases the patch does not handle. For example, when constant expressions are
used. Plan to handle those in a separate JIRA
> Improve performance of GROUPBY operator on Spark
> ------------------------------------------------
>
> Key: PIG-4709
> URL: https://issues.apache.org/jira/browse/PIG-4709
> Project: Pig
> Issue Type: Sub-task
> Components: spark
> Reporter: Pallavi Rao
> Assignee: Pallavi Rao
> Labels: spork
> Fix For: spark-branch
>
> Attachments: PIG-4709.patch
>
>
> Currently, the GROUPBY operator of PIG is mapped by Spark's CoGroup. When the
> grouped data is consumed by subsequent operations to perform algebraic
> operations, this is sub-optimal as there is lot of shuffle traffic.
> The Spark Plan must be optimized to use reduceBy, where possible, so that a
> combiner is used.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
