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From "Ilya Lantukh (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-5068) Redesign GridDhtPartitionTopologyImpl.part2node map to store only diff from affinity assignment
Date Mon, 24 Apr 2017 14:02:04 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-5068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ilya Lantukh updated IGNITE-5068:
---------------------------------
    Summary: Redesign GridDhtPartitionTopologyImpl.part2node map to store only diff from affinity
assignment  (was: Redesign usage of GridDhtPartitionTopologyImpl.part2node map to store only
diff from affinity assignment)

> Redesign GridDhtPartitionTopologyImpl.part2node map to store only diff from affinity
assignment
> -----------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-5068
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5068
>             Project: Ignite
>          Issue Type: Improvement
>    Affects Versions: 2.0
>            Reporter: Ilya Lantukh
>            Assignee: Ilya Lantukh
>
> This map can become very huge on large topologies, and rebuilding it on each update is
also costly. Some beneficial changes were made in the scope of IGNITE-4626, but further improvement
requires complete redesign.
> This map always stores affinity nodes + some additional "temporary owners". Those owners
are only needed to complete rebalancing and they will evict partition when rebalancing is
finished. It seems that storing only those non-affinity owners can greatly reduce memory required
by this map (it will be empty on stable topology) and effort needed to keep it consistent
with node2part.



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