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

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529876-001
Glossary-11
cache
enclosure. Cable ties for securing system cables are threaded through the cable
support. The cable support also contains the group and module ID labels and the rear
group service light-emitting diode (LED).
cache. See cache memory.
cache memory. Small, fast memory holding recently accessed data designed to speed up
subsequent access to the same data. Cache memory is built from faster memory chips
than main memory, and it is most often used with processor main memory as well as
network data transfer to maintain a local copy of data. Contrast with main memory.
cached bindings. A copy in virtual memory of the data pages containing symbolic
references that were rebound when a loadfile was loaded. The cached bindings are
associated with a library import characterization that characterizes the set of loadfiles
to which the symbols were bound. If the same file is subsequently loaded in an
equivalent environment in the same processor, the cached bindings can be reused.
See fastLoad.
CAE. See common applications environment (CAE).
canonical form. A standard way of representing TNS machine register values in assigned
system registers, at certain synchronization points within accelerated code. Each live
16-bit TNS register value resides in its home system register, right-justified and sign-
extended to fill the 32-bit or 64-bit register. Register values that have no future uses
are considered dead; their home system registers might contain undefined values.
The TNS machine state must be in canonical form at all register-exact points where the
program might switch to or from interpreted execution mode. At all other program
locations, Accelerator optimizations might cause TNS register values to be carried in
various noncanonical forms such as combined TNS register pairs.
canonical input mode. For an Open System Services (OSS) process, a terminal input
mode in which data is not made available to the process until an entire logical line
(delimited by a newline, EOF, or EOL character) is entered. This mode is sometimes
called line mode or nontransparent mode. Contrast with noncanonical input mode.
CAP. See cartridge access port (CAP).
Carbon Copy. A remote operations software application that enables a workstation in one
location to access, through a modem, a workstation in another location. Carbon Copy
is included with all system consoles, and service providers use it to dial in to system
consoles at customer sites. See also remote access.
card cage. A structure made up of slots that hold components such as disk drives and
ServerNet adapters.
carrier. An electrical signal that carries data.