NonStop S-Series Hardware Installation and FastPath Guide (G06.26+)

Glossary

HP NonStop S-Series Hardware Installation and FastPath Guide—529876-001

Glossary-90

request packet

request packet. A ServerNet packet sent from one ServerNet device to another, requesting

either a read action or a write action on the part of the receiving device. In the case of

a write request, the packet contains the data to be written. The receiving device is

expected to take the appropriate action and return a response packet to the device that

sent the request packet. See also response packet, ServerNet packet, and ServerNet

transaction.

requester missed address file (RMAF). A file used by the HP NonStop™ operating

system during memory-caching operations.

reserved symbol. An identifier that is reserved for use by system or compiler language

implementors.

resistance. The measure of noninductive or capacitive opposition (impedance) to current

that limits the amount of current that can be produced by an applied voltage.

Conductors have very little resistance; insulators have a large amount of resistance.

Resistance is measured in ohms.

resource. A component of a computer system that works with other components to process

transactions. Terminals, workstations, processors, memory, disk drives, processes,

files, and applications are examples of resources.

response. The information or confirmation supplied by a subsystem in reaction to a

command. A response is typically conveyed as one or more interprocess messages

from a subsystem to an application.

response packet. A ServerNet packet returned from one ServerNet device to another,

responding to an earlier received read request or write request. In the case of

responding to a read request, the response packet contains the data that the

requesting device wanted to have read. See also request packet, ServerNet packet,

and ServerNet transaction.

RESTORE. A utility for HP NonStop™ servers that copies files from a backup tape to disk.