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https://issues.apache.org/jira/browse/LUCENE-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ning Li updated LUCENE-1035:
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Attachment: LUCENE-1035.contrib.patch
Re-do as a contrib package. Creating BufferPooledDirectory with your customized
file name filter for readers allows you to decide which files you want to use
the caching layer for.
The package includes some tests. I also modified and tested the core tests with
the caching layer in a private setting and all tests passed.
> Optional Buffer Pool to Improve Search Performance
> --------------------------------------------------
>
> Key: LUCENE-1035
> URL: https://issues.apache.org/jira/browse/LUCENE-1035
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Store
> Reporter: Ning Li
> Attachments: LUCENE-1035.contrib.patch, LUCENE-1035.patch
>
>
> Index in RAMDirectory provides better performance over that in FSDirectory.
> But many indexes cannot fit in memory or applications cannot afford to
> spend that much memory on index. On the other hand, because of locality,
> a reasonably sized buffer pool may provide good improvement over FSDirectory.
> This issue aims at providing such an optional buffer pool layer. In cases
> where it fits, i.e. a reasonable hit ratio can be achieved, it should provide
> a good improvement over FSDirectory.
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