zhihaixu2012 commented on a change in pull request #3175:
URL: https://github.com/apache/hadoop/pull/3175#discussion_r670804904
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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:
Yes, Good suggestion. I think the reasonably good default number I want
to set is 10 GB , which is the same as the default value of
dfs.datanode.available-space-volume-choosing-policy.balanced-space-threshold.
since AvailableSpaceVolumeChoosingPolicy uses this default value as balanced
disk maximum difference. I think this value can safeguard the disk space and
also not waste much disk storage. What is your suggestion? thanks
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