3.5.1 Matrix Server Administration Guide

Chapter 17: Advanced Monitor Topics 277
Copyright © 1999-2007 PolyServe, Inc. All rights reserved.
At i5 in the following example, the probe fails on the Primary. At i6, the
virtual host is deconfigured on the Primary. At i7, the monitor stop script
begins on the Primary. At i8, the virtual host is configured on the second
backup. At i9, the monitor start script begins on the second backup. At
i10, probing begins on the second backup.
Custom Device Monitors
A custom device monitor is associated with a list of servers and a list of
virtual hosts configured on those servers. A custom device monitor can
be active on only one server at a time. On each server, the monitor uses a
probe mechanism to determine whether the service is active. The probe
mechanism is in one of the following states on each server: Up, Down,
Unknown, Timeout.
Primary
First Bac k up
Second Backup
Vhost status
Probe status
Monitor activity
down
stopping
active
Vhost status
Probe status
Monitor activity
inactive
down
Vhost status
Probe status
Monitor activity
inactive
inactive
i5 i6 i9 i10
inactive
starting
active
inactive
up
up
active
inactive
active
i7 i8
Time