Hadoop NFS Hadoop NFS is a Java library for building NFS gateway. It has the following components: - ONCRPC: This a implementation of ONCRPC(RFC-5531) and XDR(RFC-4506). - Mount: This an interface implementation of MOUNT protocol (RFC-1813). - Portmap: This is a implementation of Binding protocol(RFC-1833). - NFSv3: This is an interface implementation of NFSv3 protocol(RFC-1813).