ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

Glossary
ServerNet Cluster 6780 Planning and Installation Guide—527301-004
Glossary-13
IOMF CRU
enclosure is identical to a processor enclosure except that it contains I/O multifunction
(IOMF) CRUs instead of processor multifunction (PMF) CRUs.
IOMF CRU. See I/O multifunction (IOMF) CRU.
I/O multifunction (IOMF) CRU. (1) A NonStop S-series customer-replaceable unit (CRU)
that connects an I/O enclosure to a processor enclosure through a ServerNet cable
and supplies power to the components within the IOMF CRU as well as redundantly to
the disk drives, SCSI terminators, and ServerNet adapters in that enclosure. The IOMF
CRU contains a power supply, a service processor (SP), a ServerNet router, an
Ethernet controller, an external ServerNet port, and three SCSI ServerNet addressable
controllers (S-SACs) in a single unit. (2) A collective term for both IOMF CRUs and
IOMF 2 CRUs when a distinction between the two types of CRUs is not required.
IOP. See input/output process (IOP).
IP. See Internet protocol (IP).
IP address. An address that identifies a specific host to the Internet protocol (IP). An IP
address consists of two parts: a network address, which identifies the network, and a
local address, which identifies a host within a network. A network address is
concatenated with a host address to form the IP address and uniquely identify a host
within a network. IP routes data between source and destination IP addresses.
IPC. See interprocessor communication (IPC).
KB. See kilobyte (KB).
Kernel subsystem. Ithe subsystem for configuration and management of the Subsystem
Control Facility (SCF) subsystem managers that are generic processes, some system
attributes, and the ServerNet X and Y fabrics.
Kernel subsystem manager process. The generic process that starts and manages other
generic processes, some system attributes, and the ServerNet fabrics. The $ZZKRN
Kernel subsystem manager process is started and managed by the $ZPM persistence
manager process. See also generic process.
kilobyte (KB). A unit of measurement equal to 1024 bytes. See also gigabyte (GB),
megabyte (MB), and terabyte (TB).
LAN. See local area network (LAN).
layered topology. The network topology for ServerNet clusters using the HP NonStop
ServerNet Switch (model 6780). The layered topology can scale by adding cluster
switch layers or zones. The layered topology supports up to four layers and three
zones. See also star topologies.
LIF. See logical interface (LIF).