CODEWITHSUNDEEP
hadoophdfs
Abhishek D K
Abhishek D K

Reputation: 2425

correct logical URI for fs.defaultFS and dfs.nameservices?

i followd apache documentation for setting up Hadoop HA Namenode

in core-site.xml i have the following

<property>
    <name>fs.defaultFS</name>
    <value>hdfs://apache-hadoop-namenode:8020</value>
</property>

in hdfs-site.xml

<property>
    <name>dfs.nameservices</name>
    <value>apache-hadoop-namenode</value>
</property>

should value of both be the same? if so should I need to mention the port 8020 as shown above or not?

Upvotes: 0

Views: 552

Answers (1)

OneCricketeer
OneCricketeer

Reputation: 191983

dfs.nameservices can be a comma-separated list of NameServices. NameServices do not include protocols or ports.

If you have no NameServices, then hdfs://apache-hadoop-namenode:8020 would refer to a DNS name, not a NameService

This page covers federation and configuration of nameservices. https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs-rbf/HDFSRouterFederation.html

Upvotes: 0

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