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https://issues.apache.org/jira/browse/SOLR-303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553841
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Yonik Seeley commented on SOLR-303:
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{quote}I'm not quite sure about GlobalCollectionStat. Is its purpose just to
normalize weights from the shards?{quote}
It's to make a distributed search score the same as it would if everything was
in a single index.
idf (inverse document frequency) is part of the scoring, so that component
essentially does a distributed idf.
I still use the PriorityQueue, but it's been modified since SolrJ returns
objects rather than strings.
I'll try to post a draft soon... if you understood the old code, it will be
great for you to look at the new stuff to see what I'm missing.
> Distributed Search over HTTP
> ----------------------------
>
> Key: SOLR-303
> URL: https://issues.apache.org/jira/browse/SOLR-303
> Project: Solr
> Issue Type: New Feature
> Components: search
> Reporter: Sharad Agarwal
> Assignee: Yonik Seeley
> Attachments: fedsearch.patch, fedsearch.patch, fedsearch.patch,
> fedsearch.patch, fedsearch.patch, fedsearch.patch, fedsearch.patch,
> fedsearch.stu.patch, fedsearch.stu.patch
>
>
> Searching over multiple shards and aggregating results.
> Motivated by http://wiki.apache.org/solr/DistributedSearch
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