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From "Ning Li (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1035) Optional Buffer Pool to Improve Search Performance
Date Mon, 03 Mar 2008 23:12:51 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12574782#action_12574782
] 

Ning Li commented on LUCENE-1035:
---------------------------------

> It looks like this was never fully done. I wonder if this should be closed, esp. since
Ning might be working on slightly different problems now.

Sorry for the delay. I'll spend some time later this week or early next week to update and
make it a contrib patch.

> 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.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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