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Posted to dev@lucene.apache.org by "Shawn Heisey (Commented) (JIRA)" <ji...@apache.org> on 2012/04/16 15:14:19 UTC
[jira] [Commented] (SOLR-2889) Implement Adaptive Replacement Cache
[ 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:
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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.
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