TACL Reference Manual

Glossary
HP NonStop TACL Reference Manual—429513-018
Glossary-7
one-way communication.
one-way communication. A form of interprocess communication where the sender of a
message (the requester) does not expect any data in the reply from the receiver of the
message (the server). Contrast with two-way communication.
operator. Perform mathematical or logical operations on values.
page. 1,024 words of contiguous data.
page mode. A mode of communication between a terminal and its I/O process in which the
terminal stores up to a full page of data (1,920 bytes) in its own memory before
sending the page to the I/O process. Contrast with conversational mode.
PAID. See process access ID (PAID).
parallel (method of dumping). The NSAA design of multiple physical processors linked
together as a logical processor allows for parallel operations. A single processor
element, omitted from a reload of a logical processor, can be dumped and reintegrated
without affecting the other PEs in that logical processor. In this way the NonStop
operating system can perform a dump and continue application-level processing at the
same time.
PARAM. An association of an ASCII value with a parameter name made by the TACL
PARAM command. You can use PARAMs to pass parameter values to processes.
partially qualified file name. A file name in which only the right-hand file name parts are
specified. The remaining parts of the file name assume default values. Contrast with
fully qualified file name.
partitioned file. A logical file made up of several partitions that can reside on different
disks. Generic key values determine the partition on which a given record resides.
permanent disk file. A file that remains on disk until it is explicitly purged.
PE. See processor element
PFS. See process file segment (PFS).
PIN. See process identification number (PIN).
primary extent. The first contiguous area of disk allocated to a file. See also secondary
extent.
priority. An indication of the precedence with which a process gains access to the
instruction processing unit.
process. A program that has been submitted to the operating system for execution.
processor element. A single microprocessor or microprocessor core, with its associated
memory, capable of executing a single instruction stream.