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https://issues.apache.org/jira/browse/SOLR-3855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated SOLR-3855:
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Attachment: SOLR-3855.patch
New patch based on the new DV API:
- Doc values can be enabled on a per-field basis (add docValues="true" to your
field definition).
- I added support for doc values to StrField, UUIDField and all Trie*Field.
- The doc values type can be configured on the fieldType. For example, if your
string fields are unique (or almost unique), you can add docValuesType="binary"
instead of "sorted" to the fieldType definition.
- When a field has doc values, it needs to be single-valued and to be either
required or have a default value. So things like sortMissingFirt/Last don't
make sense when a field has doc values.
- By using a SchemaCodecFactory, you can configure the DocValuesFormat you
want to use (Lucene42/Disk/SimpleText/CheapBastard/AddYourOwnHere).
A good news is that thanks to the refactoring of the FieldCache API, faceting
will work on fields with doc values out of the box.
> 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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