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https://issues.apache.org/jira/browse/HDFS-11998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16056668#comment-16056668
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Chen Liang commented on HDFS-11998:
-----------------------------------
{{TestAvailableSpaceBlockPlacementPolicy}} fail seems related,
{{TestReplicationPolicyWithNodeGroup}} also fails because node group tries to
cast new class to old ones and failed, still investigating these two failures.
The other fails all passed in my local run so should be unrelated.
> Enable DFSNetworkTopology as default
> ------------------------------------
>
> Key: HDFS-11998
> URL: https://issues.apache.org/jira/browse/HDFS-11998
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-11998.001.patch
>
>
> HDFS-11530 has made it configurable to use {{DFSNetworkTopology}}, and still
> uses {{NetworkTopology}} as default.
> Given the stress testing in HDFS-11923 which shows the correctness of
> DFSNetworkTopology, and the performance testing in HDFS-11535 which shows how
> DFSNetworkTopology can outperform NetworkTopology. I think we are at the
> point where I can and should enable DFSNetworkTopology as default.
> Any comments/thoughts are more than welcome!
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