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From Josh Elser <>
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) <>



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:
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Ben Manes
> [LruBlockCache|]
appears to be based on HBase's. I currently have a patch being reviewed in [HBASE-15560|]
that replaces the pseudo Segmented LRU with the TinyLFU eviction policy. That should allow
the cache to make [better predictions|]
based on frequency and recency, such as improved scan resistance. The implementation uses
[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.

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