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https://issues.apache.org/jira/browse/HADOOP-2447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12552575
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Doug Cutting commented on HADOOP-2447:
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One could directly limit the number of files, or one could indirectly limit it
through the heap size. The latter approach was discussed in:
http://www.nabble.com/limiting-memory-use-on-namenode--td14140211.html
> HDFS should be capable of limiting Th the total number of inodes in the system
> ------------------------------------------------------------------------------
>
> Key: HADOOP-2447
> URL: https://issues.apache.org/jira/browse/HADOOP-2447
> Project: Hadoop
> Issue Type: New Feature
> Reporter: Sameer Paranjpye
> Assignee: dhruba borthakur
> Fix For: 0.16.0
>
>
> The HDFS Namenode should be capable of limiting the total number of Inodes
> (files + directories). The can be done through a config variable, settable in
> hadoop-site.xml. The default should be no limit.
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