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From "Ben Manes (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11452) Cache implementation using LIRS eviction for in-process page cache
Date Sun, 10 Apr 2016 20:07:25 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15234269#comment-15234269
] 

Ben Manes commented on CASSANDRA-11452:
---------------------------------------

[CASSANDRA-10855|https://issues.apache.org/jira/browse/CASSANDRA-10855] introduces [TinyLFU|https://github.com/ben-manes/caffeine/wiki/Efficiency]
which matches or beats LIRS at much lower space usage and complexity. This is because it uses
a frequency sketch instead of retaining a large number of ghost entries. See the [HighScalability
article|http://highscalability.com/blog/2016/1/25/design-of-a-modern-cache.html] for details.
The patch uses [Caffeine|https://github.com/ben-manes/caffeine], the successor to Guava's
cache and CLHM (used by Cassandra) which are LRU.

Can you evaluate against that?

> Cache implementation using LIRS eviction for in-process page cache
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-11452
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11452
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Local Write-Read Paths
>            Reporter: Branimir Lambov
>            Assignee: Branimir Lambov
>
> Following up from CASSANDRA-5863, to make best use of caching and to avoid having to
explicitly marking compaction accesses as non-cacheable, we need a cache implementation that
uses an eviction algorithm that can better handle non-recurring accesses.



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