[
https://issues.apache.org/jira/browse/PIG-4434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Daniel Dai resolved PIG-4434.
-----------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Patch committed to trunk. Thanks Rohini for review!
> Improve auto-parallelism for tez
> --------------------------------
>
> Key: PIG-4434
> URL: https://issues.apache.org/jira/browse/PIG-4434
> Project: Pig
> Issue Type: Improvement
> Components: tez
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.15.0
>
> Attachments: PIG-4434-1.patch, PIG-4434-2.patch, PIG-4434-3.patch,
> PIG-4434-4.patch, PIG-4434-5.patch
>
>
> Tez auto-parallelism currently has some limitation:
> 1. ShuffledVertexManager only decrease parallelism not increase
> 2. Pig currently exaggerate parallelism at frontend, ShuffledVertexManager
> might get initial parallelism way large than actual, that would be costly
> Instead of that, we can gradually adjust initial vertex parallelism at
> runtime once upstream vertexes finishes.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
