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https://issues.apache.org/jira/browse/HDFS-16450?focusedWorklogId=723610&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-723610
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ASF GitHub Bot logged work on HDFS-16450:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Feb/22 12:12
            Start Date: 09/Feb/22 12:12
    Worklog Time Spent: 10m 
      Work Description: singer-bin closed pull request #3973:
URL: https://github.com/apache/hadoop/pull/3973


   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 723610)
    Time Spent: 50m  (was: 40m)

> Give priority to releasing DNs with less free space
> ---------------------------------------------------
>
>                 Key: HDFS-16450
>                 URL: https://issues.apache.org/jira/browse/HDFS-16450
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>    Affects Versions: 3.3.0
>            Reporter: yanbin.zhang
>            Assignee: yanbin.zhang
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> When deleting redundant replicas, the one with the least free space should be 
> prioritized.
> {code:java}
> //BlockPlacementPolicyDefault#chooseReplicaToDelete
> final DatanodeStorageInfo storage;
> if (oldestHeartbeatStorage != null) {
>   storage = oldestHeartbeatStorage;
> } else if (minSpaceStorage != null) {
>   storage = minSpaceStorage;
> } else {
>   return null;
> }
> excessTypes.remove(storage.getStorageType());
> return storage; {code}
> Change the above logic to the following:
> {code:java}
> //BlockPlacementPolicyDefault#chooseReplicaToDelete
> final DatanodeStorageInfo storage;
> if (minSpaceStorage != null) {
>   storage = minSpaceStorage;
> } else if (oldestHeartbeatStorage != null) {
>   storage = oldestHeartbeatStorage;
> } else {
>   return null;
> } {code}



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