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From William Slacum <wsla...@gmail.com>
Subject Re: [DISCUSS] Java 8 support (was Fwd: [jira] [Commented] (ACCUMULO-4177) TinyLFU-based BlockCache)
Date Mon, 02 May 2016 14:37:38 GMT
Kind of hard to pull the semver card when java 1.7 technically isn't semver
compliant.

On Mon, May 2, 2016 at 10:31 AM, Mike Drob <mdrob@apache.org> wrote:

> Wasn't 1.7.0 pre SemVer?
>
> On Mon, May 2, 2016 at 8:55 AM, Josh Elser <josh.elser@gmail.com> wrote:
>
> > Thanks for the input, Sean.
> >
> > Playing devil's advocate: we didn't have a major version bump when we
> > dropped JDK6 support (in Accumulo-1.7.0). Oracle has EOL'ed java 7 back
> in
> > April 2015. Was the 6->7 upgrade different than a 7->8 upgrade?
> >
> >
> > Sean Busbey wrote:
> >
> >> If we drop jdk7 support, I would strongly prefer a major version bump.
> >>
> >> On Sun, May 1, 2016 at 1:43 PM, Josh Elser<josh.elser@gmail.com>
> wrote:
> >>
> >>> 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)
> >>>
> >>
> >>
> >>
> >>
>

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