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https://issues.apache.org/jira/browse/HDFS-16287?focusedWorklogId=674665&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-674665
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ASF GitHub Bot logged work on HDFS-16287:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Nov/21 14:46
Start Date: 03/Nov/21 14:46
Worklog Time Spent: 10m
Work Description: tomscut commented on a change in pull request #3596:
URL: https://github.com/apache/hadoop/pull/3596#discussion_r742015162
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
##########
@@ -511,7 +505,16 @@ private boolean isInactive(DatanodeInfo datanode) {
private boolean isSlowNode(String dnUuid) {
return avoidSlowDataNodesForRead && slowNodesUuidSet.contains(dnUuid);
}
-
+
+ public void setAvoidSlowDataNodesForReadEnabled(boolean enable) {
Review comment:
Thanks @haiyang1987 for your comment. I think the logic right now is no
problem.
I mean that only when ```excludeSlowNodesEnabled``` is set to true we
```startSlowPeerCollector```, and ```stopSlowPeerCollector``` when
```excludeSlowNodesEnabled``` is set to false. There is no extra overhead. What
do you think?
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Issue Time Tracking
-------------------
Worklog Id: (was: 674665)
Time Spent: 5h 20m (was: 5h 10m)
> Support to make dfs.namenode.avoid.read.slow.datanode reconfigurable
> ---------------------------------------------------------------------
>
> Key: HDFS-16287
> URL: https://issues.apache.org/jira/browse/HDFS-16287
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haiyang Hu
> Assignee: Haiyang Hu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 5h 20m
> Remaining Estimate: 0h
>
> 1. Consider that make dfs.namenode.avoid.read.slow.datanode reconfigurable
> and rapid rollback in case this feature
> [HDFS-16076|https://issues.apache.org/jira/browse/HDFS-16076] unexpected
> things happen in production environment
> 2. DatanodeManager#startSlowPeerCollector by parameter
> 'dfs.datanode.peer.stats.enabled' to control
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