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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656508#action_12656508
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Mark Miller commented on LUCENE-1483:
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bq. Or, better, we could add a "subord" to break the tie. That subord'd have to
be computed by gathering all String values that sorted to the same "odd ord"
and sorting them to assign subords.
That seems like a bit or work to manage. What if I just kept a separate double
subords that holds the old mapping? If two slots are equal, we can fall down to
that? We would have the whole new array, but the other way we have to track
what maps to the same index, sort that, and then have a map or another array
anyway. What do we save? We could have an int[] rather than a double[]? But a
lot more juggling...
> Change IndexSearcher to use MultiSearcher semantics for multiple subreaders
> ---------------------------------------------------------------------------
>
> Key: LUCENE-1483
> URL: https://issues.apache.org/jira/browse/LUCENE-1483
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch
>
>
> FieldCache and Filters are forced down to a single segment reader, allowing
> for individual segment reloading on reopen.
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