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From "Kensho Hirasawa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-10528) Use docvalue for range faceting in JSON facet API
Date Thu, 20 Apr 2017 01:04:04 GMT

    [ https://issues.apache.org/jira/browse/SOLR-10528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15975849#comment-15975849
] 

Kensho Hirasawa commented on SOLR-10528:
----------------------------------------

Yonik, Thanks for the comment.

In the first patch, I added method parameter so that users can choose an implementation.
I'm going to remove the limitations first of all and then implement SMART method like terms
facet.

> Use docvalue for range faceting in JSON facet API
> -------------------------------------------------
>
>                 Key: SOLR-10528
>                 URL: https://issues.apache.org/jira/browse/SOLR-10528
>             Project: Solr
>          Issue Type: Improvement
>          Components: Facet Module
>    Affects Versions: 6.5
>            Reporter: Kensho Hirasawa
>            Priority: Minor
>         Attachments: SOLR-10528.patch
>
>
> Range faceting in JSON facet API has only one implementation. In the implementation,
all buckets are allocated and then range queries are executed for all the buckets. Therefore,
memory usage and computational cost of range facet can be very high if range is wide and gap
is narrow. 
> I think range faceting in JSON facet should have the implementation which uses DocValues
instead of inverted indices. By scanning DocValues, we can execute range facets much more
efficiently especially when the number of buckets is large.



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