Hadoop

Interacting with Hadoop

HDFS Settings

If you choose to use HDFS as your remote filesystem for domain hosting, you'll find knowledge of certain Hadoop settings very helpful.

dfs.permissions

The following property determines whether or not users on the ElephantDB Cluster are allowed to create any directories on the HDFS Cluster. (For example, if you start up an EDB Cluster that references a nonexistent domain on HDFS, you may get a permissions error when the VersionedStore tries to create the remote root directory.)

<property> 
<name>dfs.permissions</name> 
<value>false</value> 
</property>

If this property is true, an ElephantDB ring can force directory creation on an HDFS filesystem and even transfer a local domain over.