[jira] [Created] (IGNITE-5398) Optimize allocations in RendezvousAffinityFunction

["Alexey Goncharuk (JIRA)" <ji...@apache.org>]

Alexey Goncharuk created IGNITE-5398:
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             Summary: Optimize allocations in RendezvousAffinityFunction
                 Key: IGNITE-5398
                 URL: https://issues.apache.org/jira/browse/IGNITE-5398
             Project: Ignite
          Issue Type: Improvement
          Components: cache
    Affects Versions: 2.0
            Reporter: Alexey Goncharuk
            Assignee: Alexey Goncharuk
             Fix For: 2.1


Currently {{RendezvousAffinityFunction}} allocates a new array of tuples (Long, ClusterNode) in order to create a sorted structure for the partition assignment. This structure is allocated for each cache and each partition, which leads to excessive GC pressure during partition map exchange.

I suggest we create a special container which is allocated once per context and reused for all partition assignments. This container can be reused efficiently for all caches because it's size is equal to the number of nodes in the assignment.



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