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https://issues.apache.org/jira/browse/HDFS-5517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang reopened HDFS-5517:
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Sorry about the fuss, reverted for now.
> Lower the default maximum number of blocks per file
> ---------------------------------------------------
>
> Key: HDFS-5517
> URL: https://issues.apache.org/jira/browse/HDFS-5517
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.2.0
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Labels: BB2015-05-TBR
> Attachments: HDFS-5517.002.patch, HDFS-5517.patch
>
>
> We introduced the maximum number of blocks per file in HDFS-4305, but we set
> the default to 1MM. In practice this limit is so high as to never be hit,
> whereas we know that an individual file with 10s of thousands of blocks can
> cause problems. We should lower the default value, in my opinion to 10k.
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