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https://issues.apache.org/jira/browse/LUCENE-3433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121360#comment-13121360
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Simon Willnauer commented on LUCENE-3433:
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bq. Wait, we lose SortedSource entirely? Or just for getDirectSource?
SortedSource or rather its impls. are hairy and horribly inefficient during
merge. They only support 2GB max. and load everything into heap memory during
merge. I think we can make this more efficient but as long as it is using so
much memory we shouldn't release this. I am going to create another issue we
can pick up later with a patch that contains the sorted source impls we have
today. we can then pick it up from there.
> Random access non RAM resident IndexDocValues (CSF)
> ---------------------------------------------------
>
> Key: LUCENE-3433
> URL: https://issues.apache.org/jira/browse/LUCENE-3433
> Project: Lucene - Java
> Issue Type: New Feature
> Affects Versions: 4.0
> Reporter: Yonik Seeley
> Fix For: 4.0
>
> Attachments: LUCENE-3433.patch, LUCENE-3433.patch
>
>
> There should be a way to get specific IndexDocValues by going through the
> Directory rather than loading all of the values into memory.
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