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Date: Tue, 28 Apr 2009 08:41:30 -0700 (PDT)
From: "Earwin Burrfoot (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-1618) Allow setting the IndexWriter
 docstore to be a different directory
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    [ https://issues.apache.org/jira/browse/LUCENE-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703684#action_12703684 ] 

Earwin Burrfoot commented on LUCENE-1618:
-----------------------------------------

bq. Sorry, by "diff" I meant the difference in search performance on a RAMDirectory vs NIOFSDirectory where the files are all cached by the OS.
Ah! :) It exists. Ranked by speed, directories are FSDirectory (native/sys calls), MMapDirectory (native), RAMDirectory (chunked), MemCachedDirectory (raw array access). But for the purporses of searching a small amount of freshly-indexed docs this difference is miniscule at best, me thinks.

> Allow setting the IndexWriter docstore to be a different directory
> ------------------------------------------------------------------
>
>                 Key: LUCENE-1618
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1618
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>    Affects Versions: 2.4.1
>            Reporter: Jason Rutherglen
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: MemoryCachedDirectory.java
>
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> Add an IndexWriter.setDocStoreDirectory method that allows doc
> stores to be placed in a different directory than the IW default
> dir.

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