ywskycn commented on a change in pull request #3175:
URL: https://github.com/apache/hadoop/pull/3175#discussion_r675894217
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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@@ -2657,6 +2657,17 @@
</description>
</property>
+<property>
+
<name>dfs.datanode.round-robin-volume-choosing-policy.additional-available-space</name>
+ <value>0</value>
Review comment:
4MB looks too small here, given that DataXceiver threads count is
configurable. How about 1GB? @zhihaixu2012, @jojochuang
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