Before You Start: NFS Setup Requirements

Make sure the following conditions are met before using the MapR NFS gateway:

  • The stock Linux NFS service must not be running. Linux NFS and MapR NFS cannot run concurrently.
  • The lock manager (nlockmgr) must be disabled.
  • On Red Hat and CentOS v6.0 and higher, the rpcbind service must be running. You can use the command ps ax | grep rpcbind to check.
  • On Red Hat and CentOS v5.x and lower, and on Ubuntu and SUSE, the portmapper service must be running. You can use the command ps ax | grep portmap to check.
  • The mapr-nfs package must be present and installed. You can list the contents in the /opt/mapr/roles directory to check for nfs in the list.
  • Make sure you have applied a Community Edition (M3) license or an Enterprise Edition (M5) license (paid or trial) to the cluster. See Adding a License.
  • Make sure the MapR NFS service is started. See Managing Roles and Services.
  • Verify that the primary group of the user listed for mapr.daemon.user in the /opt/mapr/conf/daemon.conf file is Restart Warden after any changes to daemon.conf.

For information about mounting the cluster via NFS, see Accessing Data with NFS.

For information on upgrading your cluster, see Upgrade Guide.


To preserve compatibility with 32-bit applications and system calls, MapR-NFS uses 32-bit inode numbers by default. On 64-bit clients, this default forces the client's 64-bit inode numbers to be hashed down to 32 bits. Hashing 64-bit inodes down to 32 bits can potentially cause inum conflicts. To change the default behavior to 64-bit inode numbers, set the value of the Use32BitFileId property to 0 in the nfsserver.conf file, then restart the NFS server.