3.1.2 Matrix Server Administration Guide

Chapter 13: Configure Device Monitors 187

Activity Type. Where the monitor can be active. The options are:

• Single-Active. The monitor is active on only one of the selected

servers. Upon server failure, the monitor will fail over to an active

server unless all associated service and device monitors are down.

(“Associated” service and device monitors are those monitors that are

associated with the same virtual host as this device monitor.)

• Single-Always-Active. The monitor is active on only one of the

selected servers. Upon server failure, the monitor will fail over to an

active server even if all associated service and device monitors are

down. (“Associated” service and device monitors are those monitors

that are associated with the same virtual host as this device monitor.)

• Multi-Active. The monitor is active simultaneously on all selected

servers. This option sets the probe type to Multi-Probe. The Selected

Servers column will not display P or B (for primary or backup).

Available Servers/Selected Servers. The type of the device monitor

affects whether the monitor should be configured on one or multiple

servers.

• Typically a

DISK device monitor is configured on one server.

•For

SHARED_FILESYSTEM monitors, you should select the servers that

mount the monitored filesystem and are running the applications that

access data from that filesystem.

• Depending on their purpose,

CUSTOM monitors can be configured on

one or more servers.

Use the arrows to move the appropriate server or servers from the

“Available Servers” column to the “Selected Servers” column. For a

Single-Active or Single-Always-Active monitor configured on multiple

servers, use the Up and Down buttons to order the servers. The first

server in the list is the primary server and the remaining servers are

backups.

To specify servers from the command line, use this option:

--servers <server1>,<server2>,...