eG Monitoring
 

Measures reported by VGStatusTest

Logical Volume Manager (LVM) is a storage management system on HPUX that lets you allocate and manage disk space for file systems or raw data. Any disk that is initialized for LVM usage is called an LVM disk or a physical volume (PV). Physical volumes are organized into volume groups (VGs). A volume group can consist of one or more physical volumes, and there can be more than one volume group in the system. Once created, the volume group, not the disk, is the entity that represents data storage. If any of these volume groups is unavailable/inactive, the data contained within that group will be rendered inaccessible to the host and the mission-critical applications running on it. The quick detection and speedy resolution of volume group failures is hence imperative to ensure 24x7 data availability. For this purpose, the VGStatusTest must be periodically executed on the target HPUX server.

This test continuously monitors the volume groups on the HPUX server, and pinpoints those groups that are unavailable/inactive. This way, the test rapidly brings volume group failures to the notice of administrators, and thus enables them to swiftly initiate remedial measures.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Status Indicates the current status of this volume group.   The values that this measure can take and their corresponding numeric values are as follows:

Measure Value Numeric Value
Unavailable/inactive 0
Available 1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current state of the RAID volume. In the graph of this measure however, the same is represented using the corresponding numeric equivalents only.