3.5.1 Matrix Server Administration Guide

Chapter 8: Configure MxFS-Linux 134

monitoring process as the Virtual NFS Services come and go from the

cluster node.

Program number 300277 has been assigned officially by the RPC

numbering registrar.

Configure Export Groups

An Export Group describes a set of PSFS filesystems to be exported. It

also specifies the Virtual NFS Services that will provide virtual IP

addresses that clients use to access those filesystems.

Export Group Overview

Export Records and Groups

The PSFS filesystems to be exported are described in export records,

which are similar to the entries in an /etc/exports file. They specify the

directory to be made available for mounting by NFS clients, the clients

that can mount the directory, and the permissions on the directory.

When you configure an Export Group, you will need to create an export

record for each filesystem or directory to be exported. You can create the

records either manually, or by importing an existing /etc/exports file. You

will also need to select one or more Virtual NFS Services to host the

Export Group.

Virtual NFS Services

Each Export Group may be associated with one or more Virtual NFS

Services. A Virtual NFS Service provides an IP address that NFS clients

can use to access the PSFS filesystems exported by the associated primary

server; in effect, it “virtualizes” the IP address associated with the NFS

Service. NFS clients access the filesystems through the Virtual NFS

Service; they do not need to know which physical node is providing the

service. Clients can access any of the filesystems specified in the Export

Group by using the DNS name or IP address of the Virtual NFS Service.

When you create a Virtual NFS Service, you will need to assign it to a

primary node and one or more backup nodes. A Virtual NFS Service can

be associated with only one Export Group. However, you can assign the

same Export Group to multiple Virtual NFS Services.