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https://issues.apache.org/jira/browse/KUDU-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17870094#comment-17870094
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ASF subversion and git services commented on KUDU-613:
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Commit 7102025af776a65715ecdabcd3be469cb1e972ea in kudu's branch
refs/heads/master from Mahesh Reddy
[ https://gitbox.apache.org/repos/asf?p=kudu.git;h=7102025af ]
KUDU-613: Add SLRU Cache metrics
This patch adds segment-specific metrics for both
the probationary and the protected segment along
with high-level metrics for the entire SLRU cache.
It also adds these same metrics to the block cache
so it can support a cache with SLRU eviction policy.
This patch adds a template parameter to the
SLRUCacheShard class to indicate which segment
a shard belongs to.
Change-Id: I1c8181ec6bea301605aaef7db0003c3eaef3072d
Reviewed-on: http://gerrit.cloudera.org:8080/21389
Tested-by: Alexey Serbin <[email protected]>
Reviewed-by: Alexey Serbin <[email protected]>
> Scan-resistant cache replacement algorithm for the block cache
> --------------------------------------------------------------
>
> Key: KUDU-613
> URL: https://issues.apache.org/jira/browse/KUDU-613
> Project: Kudu
> Issue Type: Improvement
> Components: perf
> Affects Versions: M4.5
> Reporter: Andrew Wang
> Assignee: Mahesh Reddy
> Priority: Major
> Labels: performance, roadmap-candidate
>
> The block cache currently uses LRU, which is vulnerable to large scan
> workloads. It'd be good to implement something like 2Q.
> ARC (patent encumbered, but good for ideas):
> https://www.usenix.org/conference/fast-03/arc-self-tuning-low-overhead-replacement-cache
> HBase (2Q like):
> https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/LruBlockCache.java
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