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https://issues.apache.org/jira/browse/SOLR-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13867688#comment-13867688
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Manuel Lenormand commented on SOLR-5478:
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new patch:
I redesigned it without making any changes to indexSearcher.
Implemented by:
1. A userCache ("uniqueKeyCache") that stores the the whole index's DocValues
(by a SlowWrapper AtomicReader). Its' get method returns the unique key for
every docId.
2. An event listener ("cacheWarmerListener") that renews this cache as the
[docId,uniqueKey] mapping might change every commit.
3. A change in BinaryResponseWriter that accepts a query param
(accelerateSearch) to request the uniqueKey from the cache instead of fetching
it from the stored value.
> Speed-up distributed search with high rows param or deep paging by
> transforming docId's to uniqueKey via memory docValues
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-5478
> URL: https://issues.apache.org/jira/browse/SOLR-5478
> Project: Solr
> Issue Type: Improvement
> Components: Response Writers
> Affects Versions: 4.5
> Reporter: Manuel Lenormand
> Fix For: 4.7
>
> Attachments: SOLR-5478.patch, SOLR-5478.patch
>
>
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