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Posted to issues@ignite.apache.org by "Taras Ledkov (Jira)" <ji...@apache.org> on 2021/06/18 10:08:00 UTC

[jira] [Created] (IGNITE-14940) Investigation parallel index scan

Taras Ledkov created IGNITE-14940:
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             Summary: Investigation parallel index scan
                 Key: IGNITE-14940
                 URL: https://issues.apache.org/jira/browse/IGNITE-14940
             Project: Ignite
          Issue Type: Improvement
          Components: sql
            Reporter: Taras Ledkov
             Fix For: 3.0.0-alpha3


Motivation: 2.x version implements {{queryParallelism}} by creation index segments. Each segment contains subset of partitions. This approach has several shortcomings:
- index scans parallelism cannot be changed / scaled on runtime.
- we have always scan all segments (looks like virtual MapNode for query);
- many index storages for one logical index.



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