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From <dlmar...@comcast.net>
Subject RE: LruBlockCache alternative
Date Sun, 03 Apr 2016 17:31:42 GMT
Associated issue: https://issues.apache.org/jira/browse/ACCUMULO-4177


> -----Original Message-----
> From: Christopher [mailto:ctubbsii@apache.org]
> Sent: Sunday, April 03, 2016 1:31 PM
> To: dev@accumulo.apache.org
> Subject: Re: LruBlockCache alternative
> 
> Thanks for the pointer!
> 
> On Sun, Apr 3, 2016, 12:08 Benjamin Manes <ben.manes@gmail.com> wrote:
> 
> > Hi,
> >
> > I noticed that Accumulo's LruBlockCache [1] appears to be based on
> HBase's.
> > I currently have a patch being reviewed in HBASE-15560 [2] 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. Full details
> > are in the JIRA ticket. I think it should be easy to port if there is interest.
> >
> > Cheers,
> > Ben
> >
> > [1]
> >
> >
> https://github.com/apache/accumulo/blob/master/core/src/main/java/org/
> > apache/accumulo/core/file/blockfile/cache/LruBlockCache.java
> > [2] https://issues.apache.org/jira/browse/HBASE-15560
> >


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