Known limitations
- All the changes in /usr/lpp/mmfs/hadoop/etc/hadoop/core-site.xml and /usr/lpp/mmfs/hadoop/etc/hadoop/hdfs-site.xml must
be updated in the configuration file that is used by the Hadoop distro.
However, Hadoop distro occasionally manages the configuration, and
the management interface might not support the key used for federation. IBM® BigInsights® IOP takes Ambari and Ambari
GUI does not support some property names (see Ambari-15455).
If you want to set up the federation for IBM BigInsights IOP, send an email to scale@us.ibm.com.
- The native HDFS and HDFS transparency cannot be run over the same node because of the network port number conflict.
- Before being federated to GPFS™, native HDFS must be in the running state. Otherwise, HDFS reports an exception.
- Start and stop the native HDFS cluster or the HDFS Transparency cluster separately if you want to maintain them.