3.1.2 MxFS-Linux Administration Guide

Chapter 3: Configure Virtual NFS Services 34

Export Group: Select the Export Group that will be exported by this

Virtual NFS Service. If the Export Group has not yet been created, select

NONE.

Always active: If you check this box, upon server failure, the Virtual NFS

Service will move to an active server even if the associated Export Group

monitor is inactive or down. If the box is not checked, failover will not

occur when the associated monitor is inactive or down on all of the

backup servers and the Virtual NFS Service will not be made active

anywhere. (See the “Virtual Host Activeness Policy” in the Matrix Server

Administration Guide for details.)

Policy: The policy determines the failback action that the Virtual NFS

Service will take following a failover to a backup node.

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AUTOFAILBACK. This policy is intended to return the Virtual NFS

Service to its original configuration, or as close to it as possible, after a

failover when the primary node is returned to service. After the

Virtual NFS Service fails over to a backup node, Matrix Server watches

the health of the nodes that are higher in the list of servers configured

for that Virtual NFS Service. When the health of one of these nodes is

equal to or greater than the backup node where the Virtual NFS Service

currently resides, the Virtual NFS Service will automatically attempt

to fail over to that node.

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NOFAILBACK. This policy is intended to minimize failovers. The

Virtual NFS Service remains active on the backup node, even after the

primary node is returned to service, until a “healthier” node becomes

available, at which point the Virtual NFS Service fails over to that

node. (On a “healthier” node, more of the services associated with the

Virtual NFS Service will be up than on the node currently hosting the

Virtual NFS Service.)

Network Interfaces Available/Configured: Move the interfaces on which

the Virtual NFS Service should be configured from the Available column

to the Configured column. The first interface that you select is the

primary interface. The other interfaces that you select are backups. You

can use the up and down arrows to reorder the interfaces on the

Configured column.