Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@lucene.apache.org
Date: Mon, 22 Aug 2011 14:34:29 +0000 (UTC)
From: "Uwe Schindler (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: 
 <341333611.1240.1314023669321.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <109535752.19982.1308556427501.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (LUCENE-3218) Make CFS appendable
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/LUCENE-3218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13088734#comment-13088734 ] 

Uwe Schindler commented on LUCENE-3218:
---------------------------------------

Showuld we send an email to java-user as the index format in the stable branch changed by this (indexes with new CFS files can no longer be read)?

> Make CFS appendable  
> ---------------------
>
>                 Key: LUCENE-3218
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3218
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/index
>    Affects Versions: 3.4, 4.0
>            Reporter: Simon Willnauer
>            Priority: Blocker
>             Fix For: 3.4, 4.0
>
>         Attachments: LUCENE-3218.patch, LUCENE-3218.patch, LUCENE-3218.patch, LUCENE-3218.patch, LUCENE-3218_3x.patch, LUCENE-3218_test_fix.patch, LUCENE-3218_tests.patch
>
>
> Currently CFS is created once all files are written during a flush / merge. Once on disk the files are copied into the CFS format which is basically a unnecessary for some of the files. We can at any time write at least one file directly into the CFS which can save a reasonable amount of IO. For instance stored fields could be written directly during indexing and during a Codec Flush one of the written files can be appended directly. This optimization is a nice sideeffect for lucene indexing itself but more important for DocValues and LUCENE-3216 we could transparently pack per field files into a single file only for docvalues without changing any code once LUCENE-3216 is resolved.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org