Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@lucene.apache.org
Date: Mon, 16 Apr 2012 13:14:19 +0000 (UTC)
From: "Shawn Heisey (Commented) (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: 
 <325164044.28401.1334582059496.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <421096831.18515.1320952491576.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (SOLR-2889) Implement Adaptive Replacement Cache
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/SOLR-2889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13254671#comment-13254671 ] 

Shawn Heisey commented on SOLR-2889:
------------------------------------

After thinking about what ended up being the final code for SOLR-2906, I know that I won't be able to tackle this, but I am wondering whether this is really necessary any more.  The timeDecay option on the LFU cache implementation could be viewed as an LRU tweak to the LFU cache, which I think fulfills my original goals even if it's not a true ARC cache.  Does that mean this issue should be closed?  I can't say.

I hope someone really smart is able to provide some serious speed optimization for the new LFU cache.
                
> Implement Adaptive Replacement Cache
> ------------------------------------
>
>                 Key: SOLR-2889
>                 URL: https://issues.apache.org/jira/browse/SOLR-2889
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 3.4
>            Reporter: Shawn Heisey
>            Priority: Minor
>
> Currently Solr's caches are LRU, which doesn't look at hitcount to decide which entries are most important.  There is a method that takes both frequency and time of cache hits into account:
> http://en.wikipedia.org/wiki/Adaptive_Replacement_Cache
> If it's feasible, this could be a good addition to Solr/Lucene.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
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