NonStop S-Series System Expansion and Reduction Guide

Table Of Contents

Glossary

G-Series Common Glossary

Glossary-80

process-pair list (PPL)

process-pair list (PPL). A table that contains one entry for each process or process pair

associated with a named resource. For some devices, a single PPL entry is associated

with multiple named resource list (NRL)

entries. For process pairs, a single PPL entry

describes both members of the pair.

processor. (1) A functional unit of a computer that reads program instructions, moves data

between processor memory and the input/output controllers, and performs arithmetic

operations. A processor is sometimes referred to as a central processing unit (CPU)

but HP NonStop™ servers have multiple cooperating processors rather than a single

CPU. (2) One or more computer chips, typically mounted on a logic board, that are

designed to perform data processing or to manage a particular aspect of computer

operations.

processor and memory board (PMB). A logic board that has lockstepped

microprocessors, the main memory system, and the ServerNet memory interface (SMI)

application-specific integrated circuits (ASICs) to act as an interface between the

microprocessors and memory and the ServerNet fabrics. This board is part of the

processor multifunction (PMF) customer-replaceable unit (CRU).

processor cache. A small, fast memory holding recently accessed data in order to speed

up subsequent access to the same data. Cache memory is built from faster memory

chips than main memory. It is most often used with process or main memory but is also

used in network data transfer (to maintain a local copy of data) and so forth.

processor dump. A copy of the memory of a processor. A dump can be to disk or to tape.