[jira] [Work started] (HDFS-16450) Give priority to releasing DNs with less free space

2022-02-14 Thread yanbin.zhang (Jira) 


 [ 
https://issues.apache.org/jira/browse/HDFS-16450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Work on HDFS-16450 started by yanbin.zhang.
---
> 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
> Attachments: HDFS-16450.001.patch
>
>  Time Spent: 1h 10m
>  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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[jira] [Work started] (HDFS-16450) Give priority to releasing DNs with less free space

2022-02-09 Thread yanbin.zhang (Jira) 


 [ 
https://issues.apache.org/jira/browse/HDFS-16450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Work on HDFS-16450 started by yanbin.zhang.
---
> 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
> Attachments: HDFS-16450.001.patch
>
>  Time Spent: 1h 10m
>  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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