[jira] [Commented] (LUCENE-7745) Explore GPU acceleration

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[jira] [Commented] (LUCENE-7745) Explore GPU acceleration

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/LUCENE-7745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932556#comment-15932556 ]

Ishan Chattopadhyaya commented on LUCENE-7745:
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Another experiment that, I think, is worth trying out:
* Benchmarking an aggregation over a DocValues field (e.g. using sqrt(), haversine distance etc.), and comparing the corresponding performance when executed on the GPU. This could potentially speed up scoring of results.

For reference, Postgresql seems to have experienced speedup in some areas (esp. aggregations over column oriented fields): https://www.slideshare.net/kaigai/gpgpu-accelerates-postgresql

> Explore GPU acceleration
> ------------------------
>
>                 Key: LUCENE-7745
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7745
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Ishan Chattopadhyaya
>              Labels: gsoc2017, mentor
>
> There are parts of Lucene that can potentially be speeded up if computations were to be offloaded from CPU to the GPU(s). With commodity GPUs having as high as 12GB of high bandwidth RAM, we might be able to leverage GPUs to speed parts of Lucene (indexing, search).
> First that comes to mind is spatial filtering, which is traditionally known to be a good candidate for GPU based speedup (esp. when complex polygons are involved). In the past, Mike McCandless has mentioned that "both initial indexing and merging are CPU/IO intensive, but they are very amenable to soaking up the hardware's concurrency."
> I'm opening this issue as an exploratory task, suitable for a GSoC project. I volunteer to mentor any GSoC student willing to work on this this summer.



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