LVMCombo Agent

Defines the logical volumes and volume groups associated with an application. Use LVMCombo as an alternative to LVMLogicalVolume and LVMVolumeGroup when defining logical volumes and volume groups. While LVMCombo is similar to LVMLogicalVolume and LVMVolumeGroup, it does not enable LVM configuration information to be backed up every time resources are brought online or taken offline.

Entry Points

• Online---Activates the volume group and any of the logical volumes that are not available. While each system in the cluster must import the volume group, each system does not need to activate it.

This agent does not import volume groups because of the way LVM stores configuration information. Use the HP-UX SAM tool to import a volume group.

• Offline---Deactivates the volume group, but does not deactivate the logical volumes. The logical volumes are automatically deactivated when the volume group is deactivated.
• Monitor---If the volume group and all of the logical volumes are available, the resource is online. Otherwise, the resource faults.

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  Note    The monitor entry point does not perform any I/O on disk. If a disk that makes up a logical volume is powered off, the agent is not aware of this situation until LVM marks the logical volume unavailable. This may occur if the file system or the application using the logical volume attempts an I/O operation and fails. LVM can then set the logical volume as unavailable.

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State Definitions

ONLINE---Indicates that the Volume Group and Logical Volumes are active.

OFFLINE---Indicates that the Volume Group and Logical Volumes are not active.

UNKNOWN---Indicates that a problem exists either with the configuration or the ability to determine the status of the resource.