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https://issues.apache.org/jira/browse/HDFS-7142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-7142 started by Colin Patrick McCabe.
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> Implement a 2Q eviction strategy for HDFS-6581
> ----------------------------------------------
>
> Key: HDFS-7142
> URL: https://issues.apache.org/jira/browse/HDFS-7142
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: 0002-Add-RamDiskReplica2QTracker.patch
>
>
> We should implement a 2Q or approximate 2Q eviction strategy for HDFS-6581.
> It is well known that LRU is a poor fit for scanning workloads, which HDFS
> may often encounter.
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