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From "Semen Boikov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-5385) Get rid of discovery custom message on exchange completion
Date Wed, 30 Aug 2017 09:20:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-5385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16146939#comment-16146939
] 

Semen Boikov commented on IGNITE-5385:
--------------------------------------

Implemented as part of changes related to IGNITE-6124.

> Get rid of discovery custom message on exchange completion
> ----------------------------------------------------------
>
>                 Key: IGNITE-5385
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5385
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.0
>            Reporter: Yakov Zhdanov
>            Assignee: Alexei Scherbakov
>            Priority: Blocker
>              Labels: performance
>             Fix For: 2.3
>
>
> Currently if late affinity assignment is on we send full partition map as a custom message
to make sure all nodes get it. With greater number of nodes and caches this can cause significant
slowdowns.
> We suggest to move sending to communication. In this case scenario with coordinator failure
requires special handling, since in this case some nodes may receive full map, complete exchange
and proceed with cache operations, while others may not received full map yet. In this case
full map should be resend from new coordinator - it should be recalculated if none has received
one from former coordinator or should be requested from one of the lucky receivers to get
forwarded to other nodes.



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