NODE_NAME SJC_2 SITE san_jose

........

Use the cmviewcl command to view the list of sites that are configured in the cluster and their associated nodes. Following is a sample of the command, and the output:

cmviewcl -l node

SITE_NAME

san_francisco

 

NODE

STATUS

STATE

SFO_1

up

running

SFO_2

up

running

.........

 

 

SITE_NAME

san_jose

 

NODE

STATUS

STATE

SJC_1

up

running

SJC_2

up

running

You can configure either of these failover policies for both, the regular Metrocluster failover packages and Site Controller Packages. To use these policies, you must specify site_preferred or site_preferred_manual for the failover_policy attribute in the Metrocluster package configuration file.

NOTE: For a Metrocluster package, it is recommended that the failover_policy parameter is set to site_preferred.

Volume Monitor Configuration

Starting from HP Serviceguard A.11.202, Volume Monitor is introduced to provide a means for effective and persistent monitoring of VxVM or LVM storage volumes. A separate service must be configured within a package that requires access to a VxVM or LVM storage volume. The package can be a failover package or multi-node package.

The Volume Monitor must be configured as a service within a Metrocluster package. For Site Controller package, the volume monitor must be configured as part of workload packages that requires access to VxVM or LVM storage volumes.

Example 1 how to configure a service for monitoring a single VxVM volume, /dev/vx/dsk/ cvm_dg0/lvol2, at log level 3, with a polling interval of 60 seconds, and prints all log messages to /log/monlog.log.

Example 1 Configuring Service for Volume Monitor

service_name

service_vol_mon

service_cmd

“/usr/sbin/cmvolmond -O /log/monlog.log -D 3

 

/dev/vx/dsk/cvm_dg0/lvol2”

service_restart

none

service_fail_fast_enabled

no

service_halt_timeout

300

 

 

When a monitored volume fails or becomes inaccessible, the monitor service will exit, causing the package to fail on the current node. The failover of package depends on its configured settings and on the application behavior.

For more information, see “About the Volume Monitor” in chapter 4 of Managing Serviceguard, Nineteenth Edition available at www.hp.com/go/hpux-serviceguard-docs-> HP Serviceguard.

2. HP Serviceguard A.11.20 requires additional patch to enable volume monitor feature.

28 Designing a Metrocluster