3.5.1 Matrix Server Administration Guide

Chapter 8: Configure MxFS-Linux 157

To configure the probe settings from the command line, use this

command:

mx nfsprobe configure [--frequency <seconds>] [--timeout

<seconds>] [--directRead enable|disable]

To view the configuration, use this command:

mx nfsprobe showconfig [--noHeaders] [--csv]

The --noHeaders option does not include the column headings in the

output. The --csv option prints the report in a comma-separated format.

Configure Virtual NFS Services

A Virtual NFS Service exports the PSFS filesystems specified in its

associated Export Group. Clients access the filesystems via the

hostname/IP address of the Virtual NFS Service instead of using the

hostname/IP address of the physical node.

To create a Virtual NFS Service, you will need to specify the nodes on

which the Virtual NFS Service should be configured. Optionally, you can

also specify the Export Group that should be exported by the Virtual NFS

Service. (You can also associate a Virtual NFS Service with an Export

Group when you create the Export Group.)

Sample Configurations

Following are some examples of configurations using MxFS-Linux to

provide NFS services.

Active-Active Failover Configuration

In an active-active configuration, all nodes in the matrix may act as a

primary for one or more Virtual NFS Services and as a backup for other

Virtual NFS Services. If an Export Group monitor reports a failure on a

particular node, MxFS-Linux may fail over Virtual NFS Services from that

node to a backup node. Clients then continue to access the Virtual NFS

Services via the same IP address from the backup node without

downtime or disconnection. Because the files associated with the NFS

Service are located on a PSFS cluster filesystem, the backup node can

immediately access the same filesystem data and continue with any I/O

operations in progress.