Direct NFS is an Oracle implementation of the standard NFS protocol inside Oracle Database. Using this native solution Oracle instance is able to better handle IO traffic and bypass a kernel layer of operating system. dNFS is commonly used for Exadata backups into ZFS Appliance and for Oracle databases using a NFS based solutions (like NetApp or Delphix).
The goal of this presentation is a show DBAs what is a Direct NFS, how to configure, use and monitor it. Proper configuration and monitoring are important to achieve a maximum performance and easy problem diagnostic. There will be examples of configuration with and without direct NFS.
NFS protocol is based on the TCP/IP protocol and this presentation will also show a recommended configuration of the TCP stack and explain how network should be monitored.