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https://issues.apache.org/jira/browse/HDFS-4334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13540450#comment-13540450
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Brandon Li commented on HDFS-4334:
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{quote}...~80MB is required for 1000 million inodes.{quote}
ops, I meant 10 million iondes. :-)
> Add a unique id to each INode
> -----------------------------
>
> Key: HDFS-4334
> URL: https://issues.apache.org/jira/browse/HDFS-4334
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Brandon Li
> Assignee: Brandon Li
> Fix For: 3.0.0
>
> Attachments: HDFS-4334.patch, HDFS-4334.patch, HDFS-4334.patch
>
>
> This JIRA is to track the task to add inode id, which is a 64bit number.
> Unlike many local file systems, HDFS doesn't recycle inode id.
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