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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11998) Enable DFSNetworkTopology as default
Date Wed, 21 Jun 2017 18:27:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chen Liang updated HDFS-11998:
    Attachment: HDFS-11998.002.patch

Thanks [~linyiqun] for the catch! updated in v002 patch which also made the changes of:

1. {{TestAvailableSpaceBlockPlacementPolicy}} is fixed like mentioned earlier
2. {{TestReplicationPolicyWithNodeGroup}} disables {{DFSNetworkTopology}}. This because this
test is written to test the class {{NetworkTopologyWithNodeGroup}}, which is another extension
of {{NetworkTopology}}. Enable DFSNetworkTopology for this test will have the test run against
DFSNetworkTopology, while it is meant to be running on NetworkTopologyWithNodeGroup. So disabling
DFSNetworkTopology as default for this particular test.

> 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-11998.002.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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