3.6.0 Matrix Server 3.6.0 Administration Guide (5697-7081, December 2007)

Chapter 15: Configure Virtual Hosts 178
Copyright © 1999-2007 PolyServe, Inc. All rights reserved.
Matrix Health and Virtual Host Failover
To ensure the availability of a virtual host, Matrix Server monitors the
health of the administrative network, the active network interface, and
the underlying server. If you have created service or device monitors,
those monitors periodically check the health of the specified services or
devices. If any of these checks fail, Matrix Server can transfer the virtual
host to a backup interface on another server and the network traffic will
continue.
The following example shows the virtual host failover mechanism.
Servers A and B provide the http service, which is accessed with the
virtual host www.xvz.com. Each server is configured with an http service
monitor and a
GATEWAY device monitor to ping the router.
GAT EWA Y
2000
IVITRON
V
Server A
Router
Requests to virtual host
www.xvz.com
Primary interface
for virtual host
Backup interface
for virtual host
If a health check
fails, ClusterPulse
fails ov er virtual
host www.xvz.com
to the backup interface
on Server B, where
all services are up
Adminstrative Network
Switch
ClusterPulse monitors both
Server A and Server B
PanPulse checks primary
interface and administrative
network
http service monitor checks
http service
GATEWAY device monitor
pings router
Health che cks Failov er
Server B