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https://issues.apache.org/jira/browse/LUCENE-5084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13697263#comment-13697263
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Emmanuel Espina commented on LUCENE-5084:
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Have you considered creating a PostingFormat with this? I was thinking in
something like DirectPostingsFormat but instead of using an array of ints for
storing the docIds using an Elias-Fano compressed bit stream.
Facebook is using an in-memory index for its graph search and they are
compressing the posting lists with Elias Fano
(https://www.facebook.com/download/138915572976390/UnicornVLDB-final.pdf)
> EliasFanoDocIdSet
> -----------------
>
> Key: LUCENE-5084
> URL: https://issues.apache.org/jira/browse/LUCENE-5084
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Paul Elschot
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-5084.patch
>
>
> DocIdSet in Elias-Fano encoding
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