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From Mike Drob <md...@apache.org>
Subject Re: [DISCUSS] Java 8 support (was Fwd: [jira] [Commented] (ACCUMULO-4177) TinyLFU-based BlockCache)
Date Mon, 02 May 2016 14:31:23 GMT
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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