Tao Jie created HDFS-13418:
------------------------------
Summary: NetworkTopology should be configurable when enable
DFSNetworkTopology
Key: HDFS-13418
URL: https://issues.apache.org/jira/browse/HDFS-13418
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 3.0.1
Reporter: Tao Jie
Assignee: Tao Jie
In HDFS-11530 we introduce DFSNetworkTopology and in HDFS-11998 we set
DFSNetworkTopology as the default implementation.
We still have {{net.topology.impl=org.apache.hadoop.net.NetworkTopology}} in
core-site.default. Actually this property does not effect once
{{dfs.use.dfs.network.topology}} is true.
in {{DatanodeManager}}，networkTopology is initialized as
{code}
if (useDfsNetworkTopology) {
networktopology = DFSNetworkTopology.getInstance(conf);
} else {
networktopology = NetworkTopology.getInstance(conf);
}
{code}
I think we should still make the NetworkTopology configurable rather than hard
code the implementation since we may need another NetworkTopology impl.
I am not sure if there is other consideration. Any thought? [~vagarychen]
[~linyiqun]
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