[
https://issues.apache.org/jira/browse/HDFS-7142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14147201#comment-14147201
]
Colin Patrick McCabe commented on HDFS-7142:
--------------------------------------------
Here's a patch which implements a strategy similar to 2Q, with COLD, WARM, and
HOT lists.
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
