TMF Glossary (G06.24+)

TMF Glossary
HP NonStop TMF Glossary—522415-002
Glossary-15
restore-audit volume
restore-audit volume. A disk volume on the local system used to receive audit-trail files
restored from an audit dump on tape as part of a recovery procedure. The system
manager can configure up to 16 restore-audit volumes. Any disk volume can be
configured as a restore-audit volume, including volumes configured for other TMF
purposes.
rollover. See audit-trail rollover.
round-robin. An option to the TMFCOM ALTER CATALOG command in response to which,
when set, TMF selects tapes by going through the list of available tapes completely
before starting over again. When this option is not set, TMF starts from the beginning
of the list every time it must select a tape to use.
runaway transaction. A transaction that, because of an application error, makes changes
to a very large number of records in a database. Such transactions can generate
enormous amounts of audit information; even if they do not, however, they retain (pin)
a large number of audit trail files on disk.
S
SCF. See Subsystem Control Facility (SCF).
SCREEN COBOL (SCOBOL). A process or program that runs in the NonStop Kernel
operating system environment on a NonStop system and requests services from a
server process. For example, a SCREEN COBOL program is a requester program,
and the Pathway terminal control process (TCP) is the requester process that
interprets such a requester program. Alternatively, a requester program can make
requests through procedure calls to the Pathsend facility or through the NonStop
Kernel WRITEREAD procedure. A requester is a specific type of client. See also client
and server.
server. (1) A process or program that provides services to a client or a requester. Servers
are designed to receive request messages from clients or requesters, perform the
desired operations, and return reply messages to the clients or requesters. A server
process is a running instance of a server program. (2) A combination of hardware and
software designed to provide services in response to requests received from clients
across a network. For example, the parallel servers in the NonStop range provide
transaction processing, database access, and other services. See also client,
requester, and server class.
server class. A group of duplicate copies of a single server process, all of which execute
the same object program.
single-threaded process. An application process that can deal with only one TMF
transaction during any given period of time. Having initiated a transaction, a single-
threaded requester cannot initiate another until it has terminated the existing
transaction. Similarly, having accepted a work request, a single-threaded server
cannot accept another until it has completed all of its work for the current request.