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Date: Tue, 11 Apr 2017 13:12:41 +0000 (UTC)
From: "Sergi Vladykin (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (IGNITE-4523) Allow distributed SQL query
 execution over explicit set of partitions
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archived-at: Tue, 11 Apr 2017 13:12:46 -0000


    [ https://issues.apache.org/jira/browse/IGNITE-4523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15964344#comment-15964344 ] 

Sergi Vladykin commented on IGNITE-4523:
----------------------------------------

I reviewed the patch, my comments are in Upsource.

> Allow distributed SQL query execution over explicit set of partitions
> ---------------------------------------------------------------------
>
>                 Key: IGNITE-4523
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4523
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache, SQL
>    Affects Versions: 1.8
>            Reporter: Alexei Scherbakov
>            Assignee: Alexei Scherbakov
>              Labels: important
>             Fix For: 2.0
>
>
> 3Currently distributed SQL query is executed on all nodes containing primary partitions for a cache, sending map query requests on all nodes in grid.
> Sometimes we know in advance which partitions hold a data for query, on example, in case of custom affinity function. 
> Therefore it's possible to reduce number of nodes receiving map query request by providing explicit set of partitions, which will give significant performance advantage and traffic reduction in case of very large clusters.
> Internally we already have such functionality, so the only necessary thing is to provide public API for what.


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