HP-UX HB v13.00 Ch-15 - Serviceguard

HP-UX Handbook – Rev 13.00 Page 11 (of 108)
Chapter 15 Serviceguard
October 29, 2013
Figure 3: Reduced business outage due to redundant hardware and Serviceguard intervention
Though a node failure occurred, all other components continue to operate as expected. Package
failover incurs an application outage for a period of time represented by the time it takes for
Serviceguard to reform the cluster + identify an adoptive node that suits package startup +
package startup time (including file system check/mount) + application startup time and data
recovery if necessary.
A cluster configuration can exist in a single computer room, which is vulnerable to a site outage,
but an extended distance cluster or campus cluster can deal with the effects of a site failure.
Node2
node1
SAN
Switch
1
Storage Array 1
SAN
Switch
2
USERS
Network
switch
1
Network
switch
2
pkgB
pkgA IP
pkgB IP
pkgA
data
pkgB
data
Redundant
connections
pkgA
data
pkgB
mirror
Storage Array 2
pkgA
mirror
pkgB
data
Boot &
AppA
AppB
Boot &
AppA
AppB
pkgA
UPS POWER
UPS POWER