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https://issues.apache.org/jira/browse/SOLR-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrzej Bialecki updated SOLR-1632:
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Attachment: distrib.patch
Initial implementation. This supports the current global IDF (i.e. none ;) ),
and an exact version of global IDF that requires one additional request per
query to obtain per-shard stats.
The design should be already flexible enough to implement LRU caching of
docFreqs, and ultimately to implement other methods for global IDF calculation
(e.g. based on estimation or re-ranking).
> Distributed IDF
> ---------------
>
> Key: SOLR-1632
> URL: https://issues.apache.org/jira/browse/SOLR-1632
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.5
> Reporter: Andrzej Bialecki
> Attachments: distrib.patch
>
>
> Distributed IDF is a valuable enhancement for distributed search across
> non-uniform shards. This issue tracks the proposed implementation of an API
> to support this functionality in Solr.
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