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https://issues.apache.org/jira/browse/HDDS-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17261089#comment-17261089
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Rakesh Radhakrishnan commented on HDDS-4565:
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Another idea is, as part of the {{orphan cleanup}} logic, OM can update quota
bytes to the bucket info in async fashion. This way, OM guarantees eventual
consistency model for the quota bytes. This would be the simplest approach
rather than iterating over all the subpaths or maintain extra info at dir level.
> Delete : quotaReleased on directory deletion should consider all sub paths
> --------------------------------------------------------------------------
>
> Key: HDDS-4565
> URL: https://issues.apache.org/jira/browse/HDDS-4565
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Rakesh Radhakrishnan
> Assignee: Rakesh Radhakrishnan
> Priority: Critical
>
> In case of directory will not have any blocks, we need to get the bytesUsed
> from all the keys in the directory, but if we do that it will be an expensive
> operation.
> _Just some thought:_ Can we maintain byteUsed at directory level also, so we
> can sum up all byteUsed at directory level. Need to think more here.
> Review comment
> [1|https://github.com/apache/ozone/pull/1668#discussion_r537943319] and
> [2|https://github.com/apache/ozone/pull/1607#discussion_r529974503]
>
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