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https://issues.apache.org/jira/browse/LUCENE-1476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662089#action_12662089
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Michael McCandless commented on LUCENE-1476:
--------------------------------------------
{quote}
> There's going to be a change rate that overwhelms the multi-file
> commit system, and it seems that you've determined you're up against
> it.
{quote}
Well... IndexWriter need not "commit" in order to allow a reader to
see the files?
Commit is for crash recovery, and for knowing when it's OK to delete
prior commits. Simply writing the files (and not syncing them), and
perhaps giving IndexReader.open the SegmentInfos to use directly (and
not writing a segments_N via the filesystem) would allow us to search
added docs without paying the cost of sync'ing all the files.
Also: brand new, tiny segments should be written into a RAMDirectory
and then merged over time into the real Directory.
> BitVector implement DocIdSet
> ----------------------------
>
> Key: LUCENE-1476
> URL: https://issues.apache.org/jira/browse/LUCENE-1476
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.4
> Reporter: Jason Rutherglen
> Priority: Trivial
> Attachments: LUCENE-1476.patch
>
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> BitVector can implement DocIdSet. This is for making
> SegmentReader.deletedDocs pluggable.
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