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Posted to dev@lucenenet.apache.org by "Jeevananthan-23 (via GitHub)" <gi...@apache.org> on 2023/04/10 15:15:51 UTC
[GitHub] [lucenenet] Jeevananthan-23 opened a new issue, #817: Support for Concurrency Segments IndexSearch and parallel DrillSideways
Jeevananthan-23 opened a new issue, #817:
URL: https://github.com/apache/lucenenet/issues/817
It could be great lucenenet support for [Better Segment To Thread Mapping Algorithm](https://issues.apache.org/jira/browse/LUCENE-8757) and [A parallel DrillSideways implementation](https://issues.apache.org/jira/browse/LUCENE-7588) for better concurrency implementation. I also like to know more about Lucenenet concurrency.
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[GitHub] [lucenenet] Jeevananthan-23 commented on issue #817: Support for Concurrency Segments IndexSearch and parallel DrillSideways
Posted by "Jeevananthan-23 (via GitHub)" <gi...@apache.org>.
Jeevananthan-23 commented on issue #817:
URL: https://github.com/apache/lucenenet/issues/817#issuecomment-1519611247
cc: @NightOwl888 , @laimis
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[GitHub] [lucenenet] rclabo commented on issue #817: Support for Concurrency Segments IndexSearch and parallel DrillSideways
Posted by "rclabo (via GitHub)" <gi...@apache.org>.
rclabo commented on issue #817:
URL: https://github.com/apache/lucenenet/issues/817#issuecomment-1502346958
In general, LuceneNET has great concurrency support. The parallel DrillSideways implementation you mentioned is specifically for facets. That particular feature wasn't added until Lucene 9. As such it won't be added to LuceneNET 4.8.
However, it is currently hoped that after LuceneNET 4.8 has a production release, we will begin working on catching up LuceneNET to the latest version of Java Lucene.
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[GitHub] [lucenenet] Jeevananthan-23 commented on issue #817: Support for Concurrency Segments IndexSearch and parallel DrillSideways
Posted by "Jeevananthan-23 (via GitHub)" <gi...@apache.org>.
Jeevananthan-23 commented on issue #817:
URL: https://github.com/apache/lucenenet/issues/817#issuecomment-1502965652
> In general, LuceneNET has great concurrency support. The parallel DrillSideways implementation you mentioned is specifically for facets. That particular feature wasn't added until Lucene 9. As such it won't be added to LuceneNET 4.8.
parallel DrillSideways implementation is added back in Lucene 7 and Better Segment Thread Map algo is part of Lucene 9 expecting both the improvements added to LuceneNet 4.8.
>
> However, it is currently hoped that after LuceneNET 4.8 has a production release, we will begin working on catching up LuceneNET to the latest version of Java Lucene.
Coming back to LuceneNet concurrency is not supported for Async also some of the concurrency works rely on Dedicated ThreadPool with the help of TaskScheduler APIs like IndexSearch, ConcurrentMergerScheduler and etc.., To handle this kind of scenario LuceneNet uses `LimitedConcurrencyLevelTaskScheduler.cs`.
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