Clustered Network File System (CNFS) is a solution to deliver active/active NFS serving over an underlying cluster file system. Each node in a CNFS cluster runs the complete Cluster Volume Manager-Cluster File System-Veritas Cluster Server ( CVM-CFS-VCS) stack, and in addition, the CNFS server parallel application component. The CNFS server converts the NFS request from the client to POSIX file system requests and issues them to the underlying CFS instance. The CFS and the CVM instances coordinate to provide concurrent access to one or more file systems from all the cluster nodes. A cluster-wide volume and file system configuration allows for simplified management. Additionally, an integrated cluster volume manager presents every node in the cluster with the same logical view of shared device configurations.
Veritas Storage Foundation Cluster File System (CFS) from Symantec offers an efficient solution for providing active/active NFS serving at a fraction of the cost of high-end Network Attached Storage (NAS) heads and filers. CFS takes advantage of existing SAN infrastructure and scalability can be achieved both at the client connectivity layer and the backend storage layer. CFS is tuned to handle multiple types of workloads from access to large files to many clients accessing multiple small-sized files.
The Oracle Database 11g Direct NFS client integrates the NFS client functionality directly in the Oracle software. Through this integration, the I/O path between Oracle and the NFS server is optimized providing significantly better performance. In addition, the Direct NFS client simplifies and, in many cases, automates the performance optimization of the NFS client configuration for database workloads.