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https://issues.apache.org/jira/browse/IGNITE-7823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Pereslegin updated IGNITE-7823:
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Comment: was deleted
(was: Hello [~avinogradov],
I merged with master and updated TC results.)
> Separate cache for non collocated IgniteSet.
> --------------------------------------------
>
> Key: IGNITE-7823
> URL: https://issues.apache.org/jira/browse/IGNITE-7823
> Project: Ignite
> Issue Type: New Feature
> Components: data structures
> Reporter: Andrey Kuznetsov
> Assignee: Pavel Pereslegin
> Priority: Major
> Fix For: 2.7
>
>
> Currently, single data structures cache is shared between several collection
> instances (IgniteQueue, IgniteSet).
> To support iterator() and size() IgniteSet maintains plain on-heap Java sets
> on every node (see CacheDataStructuresManager.setDataMap). These sets
> duplicate backing-cache entries, both primary and backup. For big
> non-collocated sets it's too expensive to maintain redundant onheap data
> copies. The simplest way to avoid copies is to use separate cache for
> non-collocated IgniteSet version; hence size of set is the same as size of
> backing cache, and also set iterator is virtually the same as backing cache
> iterator.
> The difference between exising set implementation and set based on separate
> cache should be properly documented afterwards.
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