Managing Serviceguard Nineteenth Edition, Reprinted June 2011

NOTE: EMS cannot be used to monitor the status of VxVM disk groups. For this you should use

the volume monitor cmvolmond which is supplied with Serviceguard. cmvolmond can also monitor

LVM volumes. See “About the Volume Monitor” (page 123).

resource_name /vg/vgpkg/pv_summary

resource_polling_interval 60

resource_start AUTOMATIC

resource_up_value = UP

The example above will monitor all PV links for the volume group vgpkg. As long as all devices

within the vgpkg volume group are functional, the resource will remain in UP status. When the

last path to the storage for the volume group fails, or any device within the volume group fails, the

resource value will change, and at the next polling interval the package will fail because the

resource no longer meets the package requirements. The package can then fail over to any other

node for which this resource is still in the UP status.

IMPORTANT: You must set the IO timeout for all logical volumes within the volume group being

monitored to something other than the default of zero (no timeout); otherwise the EMS resource

monitor value will never change upon a failure. Suggested IO timeout values are 20 to 60 seconds.

See “Setting Logical Volume Timeouts” (page 171) for more information.

For more information, see “Using the EMS HA Monitors” (page 56).

LVM Worksheet

You may find a worksheet such as the following useful to help you organize and record your

physical disk configuration. This worksheet is an example; blank worksheets are in Appendix E

(page 355). Make as many copies as you need.

NOTE: Under agile addressing, the physical volumes in the sample worksheet that follows would

have names such as disk1, disk2, etc. See “About Device File Names (Device Special Files)”

(page 77).

As of A.11.20, Serviceguard supports cluster-wide DSFs, and HP recommends that you use them.

See “About Cluster-wide Device Special Files (cDSFs)” (page 99).

=============================================================================

Volume Group Name: __________/dev/vg01__________________________________

Name of First Physical Volume Group: _______bus0___________________________

Physical Volume Name: ____________/dev/dsk/c1t2d0__________________________

Physical Volume Name: ____________/dev/dsk/c2t2d0__________________________

Physical Volume Name: ____________/dev/dsk/c3t2d0__________________________

Physical Volume Name: _____________________________________________________

Name of Second Physical Volume Group: _______bus1____________________________

Physical Volume Name: ______________/dev/dsk/c4t2d0________________________

Physical Volume Name: ______________/dev/dsk/c5t2d0________________________

Physical Volume Name: ______________/dev/dsk/c6t2d0________________________

Physical Volume Name: _____________________________________________________

LVM Planning 97