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https://issues.apache.org/jira/browse/SOLR-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789174#action_12789174
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Andrzej Bialecki commented on SOLR-1632:
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I'm not sure what approach you are referring to. Following the terminology in
that thread, this implementation follows the approach where there is a single
merged big idf map at the master, and it's sent out to slaves on each query.
However, when exactly this merging and sending happens is
implementation-specific - in the ExactDFSource it happens on every query, but I
hope the API can support other scenarios as well.
> 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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