Configuring an Underlying Storage System

If you want to use a unified client API and a global namespace to access persistent storage systems including HDFS and OBS to separate computing from storage, you can configure the underlying storage system of Alluxio on MRS Manager. After a cluster is created, the default underlying storage address is hdfs://hacluster/, that is, the HDFS root directory is mapped to Alluxio.

Prerequisites

Alluxio has been installed in a cluster.
The password of user admin has been obtained. The password of user admin is specified by the user during MRS cluster creation.

Configuring HDFS as the Underlying File System of Alluxio

Security clusters with Kerberos authentication enabled do not support this function.

Go to the All Configurations page of Alluxio. See Modifying Cluster Service Configuration Parameters.
In the left pane, choose Alluxio > Under Stores, and modify the value of alluxio.master.mount.table.root.ufs to hdfs://hacluster/XXX/.

For example, if you want to use HDFS root directory/alluxio/ as the root directory of Alluxio, modify the value of alluxio.master.mount.table.root.ufs to hdfs://hacluster/alluxio/.

Figure 1 Configuring HDFS as the underlying file system of Alluxio
Click Save Configuration. In the displayed dialog box, select Restart the affected services or instances.
Click OK to restart Alluxio.