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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2013/02/12 13:39:12 UTC
[jira] [Commented] (SOLR-3855) DocValues support
[ https://issues.apache.org/jira/browse/SOLR-3855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576588#comment-13576588 ]
Robert Muir commented on SOLR-3855:
-----------------------------------
I like the size of this patch!
One thing thats a little confusing is the multivalued check against a boolean 'hasDocValues'.
In lucene this is not a limitation of docvalues per-say, instead its controlled-per-type. it just happens that all 3 types today have consumers that check for this and throw exception, but we might add a multi-valued type later (LUCENE-4765).
Separately there is also the possibility that someone can lay down their own multi-valued encoding over e.g. a binary dv (like lucene facets/). But if we have a private check called from SchemaField's ctor and checks in e.g. DocumentBuilder, it seems like this would be difficult to change. Maybe as a start we should just let IndexWriter handle the check here?
> DocValues support
> -----------------
>
> Key: SOLR-3855
> URL: https://issues.apache.org/jira/browse/SOLR-3855
> Project: Solr
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: 4.2, 5.0
>
> Attachments: SOLR-3855.patch, SOLR-3855.patch, SOLR-3855.patch
>
>
> It would be nice if Solr supported DocValues:
> - for ID fields (fewer disk seeks when running distributed search),
> - for sorting/faceting/function queries (faster warmup time than fieldcache),
> - better on-disk and in-memory efficiency (you can use packed impls).
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