NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-13
CISC processor
CISC processor. An instruction processing unit (IPU) that is based on complex
instruction-set computing (CISC) architecture.
class. A group of object-oriented data entities and the methods associated with that group.
Class-1 CRU. A customer-replaceable unit (CRU) that probably will not cause a partial or
total system outage if the documented replacement procedure is not followed correctly.
Customers replacing Class-1 CRUs are not required to have previous experience
replacing HP NonStop™ S-series CRUs. However, for some CRUs, customers must
be able to use the tools needed for the replacement procedure (which are common
tools) and must protect components from electrostatic discharge (ESD).
Class-2 CRU. A customer-replaceable unit (CRU) that might cause a partial or total system
outage if the documented replacement procedure is not followed correctly. Customers
replacing Class-2 CRUs should have either three or more months of experience
replacing HP NonStop™ S-series CRUs or equivalent training. Customers must be
able to use the tools needed for the replacement procedure and must protect
components from electrostatic discharge (ESD).
Class-3 CRU. A customer-replaceable unit (CRU) that probably will cause a partial or total
system outage if the documented replacement procedure is not followed correctly.
Customers replacing Class-3 CRUs should have either six or more months of
experience replacing HP NonStop™ S-series CRUs or equivalent training. Customers
must be able to use the tools needed for the replacement procedure, must protect
components from electrostatic discharge (ESD), and must understand the
dependencies involved in NonStop S-series CRU-replacement procedures, such as
disk-path switching. Replacement by a service provider trained by HP is
recommended.
client. A software process, hardware device, or combination of the two that requests
services from a server. Often, the client is a process residing on a programmable
workstation and is the part of an application that provides the user interface. The
workstation client might also perform other portions of the application logic.
client application. An application that requests a service from a server application.
Execution of remote procedure calls is an example of a client application.
client (of a loadable library). A loadfile that uses functions or data from a library.
CLIP. See communications line interface processor (CLIP).
cluster. (1) A collection of servers, or nodes, that can function either independently or
collectively as a processing unit. See also ServerNet cluster. (2) A term used to
describe a system in a Fiber Optic Extension (FOX) ring. More specifically, a FOX
cluster is a collection of processors and I/O devices functioning as a logical group. In
FOX nomenclature, the term is synonymous with system or node.
cluster number. A number that uniquely identifies a node in a Fiber Optic Extension (FOX)
ring. This number is in the range 1 through 14. See also node number.