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https://issues.apache.org/jira/browse/SOLR-13350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841688#comment-16841688
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David Smiley commented on SOLR-13350:
-------------------------------------
I just want to point out that this idea was explored by Etsy who presented
their findings in a Lucene Revolution presentation years ago:
[https://www.slideshare.net/lucidworks/searchtime-parallelism-presented-by-shikhar-bhushan-etsy-41862845]
One issue that I remember is that there is difficulty in concurrently using a
DocSetCollector (subsequently used for filter cache and stats/facets) which was
not designed for concurrency. You can see the slides cover that.
> Explore collector managers for multi-threaded search
> ----------------------------------------------------
>
> Key: SOLR-13350
> URL: https://issues.apache.org/jira/browse/SOLR-13350
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
> Assignee: Ishan Chattopadhyaya
> Priority: Major
> Attachments: SOLR-13350.patch, SOLR-13350.patch, SOLR-13350.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> AFAICT, SolrIndexSearcher can be used only to search all the segments of an
> index in series. However, using CollectorManagers, segments can be searched
> concurrently and result in reduced latency. Opening this issue to explore the
> effectiveness of using CollectorManagers in SolrIndexSearcher from latency
> and throughput perspective.
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