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https://issues.apache.org/jira/browse/HDFS-5636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841653#comment-13841653
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Colin Patrick McCabe commented on HDFS-5636:
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I'm not sure about this one. Generally different cache pools are associated
with different users, and users don't "age out" in most of the clusters I'm
familiar with. Let's see how people make use of the existing TTL stuff. We
can always add this later if need be.
> Enforce a max TTL per cache pool
> --------------------------------
>
> Key: HDFS-5636
> URL: https://issues.apache.org/jira/browse/HDFS-5636
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: caching, namenode
> Affects Versions: 3.0.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
>
> It'd be nice for administrators to be able to specify a maximum TTL for
> directives in a cache pool. This forces all directives to eventually age out.
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