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https://issues.apache.org/jira/browse/IGNITE-4523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15807556#comment-15807556
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Alexei Scherbakov commented on IGNITE-4523:
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I implemented query execution on nodes assigned as primary for partitions from
a set passed to a query.
Implemented a test for the scenario mentioned in previous post: partitions are
divided to subsets and each subset is bound to a some region, on example,
geographic.
So we have data in different regions and are able to do distributed queries
over a region without broadcasting to whole cluster and skip index definition
on region.
Need to add more tests before making PR.
> 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
> Fix For: 2.0
>
>
> Currently 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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