Configure mountable HDFS

CDP includes a FUSE (Filesystem in UserSpace) interface into HDFS. The hadoop-hdfs-fuse command enables you to use your HDFS cluster as if it were a traditional filesystem on Linux.

You must have a working HDFS cluster and know the hostname and port that your NameNode exposes.

Set up and test your mount point depending on whether you have an HA or a non-HA configuration.
- To set up and test your mount point in a non-HA installation:
```
$ mkdir -p <mount_point>
$ hadoop-fuse-dfs dfs://<name_node_hostname>:<namenode_port> <mount_point>
```
  where namenode_port is the NameNode's RPC port, dfs.namenode.servicerpc-address.
- To set up and test your mount point in an HA installation:
```
mkdir -p <mount_point>
hadoop-fuse-dfs dfs://<nameservice_id> <mount_point>
```
- where nameservice_id is the value of fs.defaultFS. In this case the port defined for dfs.namenode.rpc-address.[nameservice ID].[name node ID] is used automatically.
You can now run operations as if they are on your mount point.
note

To find its configuration directory, hadoop-fuse-dfs uses the HADOOP_CONF_DIR configured at the time the mount command is invoked.
Clean up your test mount by using the umount command.
```
umount <mount_point>
```

You can now add a permanent HDFS mount which persists through reboots.