accumulo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Josh Elser <josh.el...@gmail.com>
Subject [DISCUSS] Java 8 support (was Fwd: [jira] [Commented] (ACCUMULO-4177) TinyLFU-based BlockCache)
Date Sun, 01 May 2016 18:43:23 GMT
Folks --

Let's come up with a plan for Java 8 support. Do we bump minJdk for 
accumulo-1.8.0 to 8? Should we fork a branch for 1.8 and make master 
2.0.0-SNAPSHOT (and do the bump there)?

Other approaches?

- Josh

-------- Original Message --------
Subject: [jira] [Commented] (ACCUMULO-4177) TinyLFU-based BlockCache
Date: Sat, 30 Apr 2016 01:06:12 +0000 (UTC)
From: Ben Manes (JIRA) <jira@apache.org>
Reply-To: jira@apache.org
To: notifications@accumulo.apache.org


     [ 
https://issues.apache.org/jira/browse/ACCUMULO-4177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265032#comment-15265032

]

Ben Manes commented on ACCUMULO-4177:
-------------------------------------

I can put something together when Accumulo is ready to accept Java 8 
patches. Let me know.

> TinyLFU-based BlockCache
> ------------------------
>
>                 Key: ACCUMULO-4177
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4177
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Ben Manes
>
> [LruBlockCache|https://github.com/apache/accumulo/blob/master/core/src/main/java/org/apache/accumulo/core/file/blockfile/cache/LruBlockCache.java]
appears to be based on HBase's. I currently have a patch being reviewed in [HBASE-15560|https://issues.apache.org/jira/browse/HBASE-15560]
that replaces the pseudo Segmented LRU with the TinyLFU eviction policy. That should allow
the cache to make [better predictions|https://github.com/ben-manes/caffeine/wiki/Efficiency]
based on frequency and recency, such as improved scan resistance. The implementation uses
[Caffeine|https://github.com/ben-manes/caffeine], the successor to Guava's cache, to provide
concurrency and keep the patch small.
> Full details are in the JIRA ticket. I think it should be easy to port if there is interest.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message