Glossary
MIB II (MIB2) A MIB that defines information about the system, the network interface cards it contains, routing information it contains, the TCP and UDP sockets it contains and their states, and various statistics related to error counts. This MIB is widely adopted and is served by most IP- addressed devices. Most system and network resources managed by EMS HA Monitors are taken from this MIB.
monitor See resource monitor.
notification See alert.
physical extent LVM divides each physical disk into addressed units called physical extents.
physical volume A disk that has been initialized as an LVM disk.
PVG (physical volume group) A grouping of physical devices: host adapters, busses, controllers, or disks, that allow LVM to manage redundant links or mirrored disks and access the redundant hardware when the primary hardware fails.
PV links A method of LVM configuration that allows you to provide redundant SCSI interfaces and buses to
disk arrays, thereby protecting against single points of failure in SCSI cards and cables.
polling The process by which a monitor obtains the most recent status of a resource.
registrar The registrar process provides the link between resource status consumers (clients) and resource status providers (resource monitors). The central part of the resource monitor framework which uses the resource dictionary to act as an intermediary between client systems and resource monitors.
resource May be any entity a monitor application developer names. Examples include a network interface, CPU statistics, a MIB object, or a network service.
resource class A category of resources useful during configuration. For example, /net/interfaces/lan/status is provided as a resource class.
resource dictionary A file describing the hierarchy of resources that can be monitored and the processes that perform the resource monitoring.
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