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https://issues.apache.org/jira/browse/LUCENE-4769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576377#comment-13576377
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Robert Muir commented on LUCENE-4769:
-------------------------------------
I still dont get why you need anything special here, more than what Lucene
already provides.
You seem hell-bent on the idea that lucene should have a getInts(docid,
IntsRef) api for facets.
What I'm trying to say is, if you really think thats the API you should have,
nothing in lucene stops you from doing this, just add it:
{code}
package org.apache.lucene.facet.index;
abstract class FacetDocValues extends BinaryDocValues {
abstract void getInts(int docid, IntsRef ref);
}
{code}
What is the problem? You can then make a jazillion implementations like
LUCENE-4764 extend that API and have one collector that uses it.
> Add a CountingFacetsAggregator which reads ordinals from a cache
> ----------------------------------------------------------------
>
> Key: LUCENE-4769
> URL: https://issues.apache.org/jira/browse/LUCENE-4769
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-4769.patch
>
>
> Mike wrote a prototype of a FacetsCollector which reads ordinals from a
> CachedInts structure on LUCENE-4609. I ported it to the new facets API, as a
> FacetsAggregator. I think we should offer users the means to use such a
> cache, even if it consumes more RAM. Mike tests show that this cache consumed
> x2 more RAM than if the DocValues were loaded into memory in their raw form.
> Also, a PackedInts version of such cache took almost the same amount of RAM
> as straight int[], but the gains were minor.
> I will post the patch shortly.
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