Access HDFS from the NFS Gateway

To access HDFS, you must first mount the namespace and then set up the NFS client hosts to interact with HDFS through the Gateway.

Mount the HDFS namespace.

mount -t nfs -o vers=3,proto=tcp,nolock,sync,rsize=1048576,wsize=1048576
                  $server:/ $mount_point

Access HDFS as part of the local file system, except that hard link or symbolic link and random write are not supported.

	Note
Because NLM is not supported, the mount option `nolock` is required. You can use the `sync` option for improving the performance and reliability when writing large files. If the sync option is specified, the NFS client flushes write operations to the NFS Gateway before returning control to the client application. Additionally, the client does not issue reordered writes. This reduces buffering requirements on the NFS gateway.

Note

Because NLM is not supported, the mount option nolock is required.

You can use the sync option for improving the performance and reliability when writing large files. If the sync option is specified, the NFS client flushes write operations to the NFS Gateway before returning control to the client application. Additionally, the client does not issue reordered writes. This reduces buffering requirements on the NFS gateway.

Set up the NFS client users to interact with HDFS through the NFS Gateway.