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

Glossary

HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001

Glossary-84

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.

process snapshot. The contents of a saveabend file or process snapshot file.

process snapshot file. (1) A file containing dump information needed by the system

debugging tool. In UNIX systems, such files are usually called core files or core dump

files. (2) A file containing the state of a running process at a specific moment,

regardless of whether the process terminated abnormally. See also saveabend file.

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. Because a processor is composed of several hardware components that

reside in different enclosures, it is sometimes called a logical processor. 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. 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.