Automatic configuration refresh

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The Automatic configuration refresh feature is supported in gpfs.hdfs-protocol 2.7.0-2 and later.

After making configuration changes in /usr/lpp/mmfs/hadoop/etc/hadoop (for HDFS Transparency 2.7.3-x) or /var/mmfs/hadoop/etc/hadoop (for HDFS Transparency 3.0.0) or in the IBM Storage® Scale file system, such as maximum number of replica and NSD server, run the following command to refresh HDFS transparency without restarting the HDFS transparency services:
/usr/lpp/mmfs/hadoop/bin/gpfs dfsadmin -refresh
<namenode_hostname>:<port> refreshGPFSConfig

Run the command on any HDFS transparency node and change <namenode_hostname>:<port> according to the HDFS transparency configuration. For example, if fs.defaultFS is hdfs://c8f2n03.gpfs.net:8020 in /usr/lpp/mmfs/hadoop/etc/hadoop/core-site.xml, replace <namenode_hostname> with c8f2n03.gpfs.net and <port> with 8020. HDFS transparency synchronizes the configuration changes with the HDFS transparency services running on the HDFS transparency nodes and makes it immediately effective.