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https://issues.apache.org/jira/browse/HDFS-7811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao updated HDFS-7811:
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Attachment: HDFS-7811.00.patch
Post the patch that avoids recursive getStoragePolicyID call for directory
quota usage calculation.
> Avoid recursive call getStoragePolicyID in INodeFile#computeQuotaUsage
> ----------------------------------------------------------------------
>
> Key: HDFS-7811
> URL: https://issues.apache.org/jira/browse/HDFS-7811
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Fix For: 2.7.0
>
> Attachments: HDFS-7811.00.patch
>
>
> This is a follow up based on comment from [~jingzhao] on HDFS-7723.
> I just noticed that INodeFile#computeQuotaUsage calls getStoragePolicyID to
> identify the storage policy id of the file. This may not be very efficient
> (especially when we're computing the quota usage of a directory) because
> getStoragePolicyID may recursively check the ancestral INode's storage
> policy. I think here an improvement can be passing the lowest parent
> directory's storage policy down while traversing the tree.
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