3.5.1 Matrix Server Administration Guide

Chapter 8: Configure MxFS-Linux 156

Configure the Global NFS Probe Settings

The global NFS probe periodically checks the following on each node:

• The health of the NFS Server. The probe does this by issuing a NULL

RPC call to the NFS Server on the local node.

• The general health of the MxFS-Linux high-availability service. The

probe does this by checking for critical MxFS-Linux processes. (If the

node is initializing or shutting down, the processes may not be

running.)

In general, if the global NFS monitor detects that the NFS Server or an

MxFS-Linux process is not up on a particular node, any Virtual NFS

Services active on that node will fail over to a backup. The Export Group

monitors on the node with the failure will report a

DOWN status and the

error information.

To configure the global NFS probe, select Matrix > NFS Probe Settings on

the Management Console.

Frequency (seconds). The interval, in seconds, at which the global NFS

probe is executed. The default is 60 seconds.

Timeout (seconds). The maximum amount of time that the global NFS

probe will wait for an RPC call to complete. The default is 60 seconds.

Disable direct read. By default, the Export Group probe does a direct IO

read operation to every exported PSFS filesystem. You may want to

disable this feature if the extra IO is causing problems on your system. To

disable the feature, click the checkbox. When the feature is disabled, the

Export Group probe will continue to check that the filesystem is

mounted.