TMF Glossary (G06.26+)

TMF Glossary
HP NonStop TMF Glossary—522415-003
Glossary-14
primary process
primary process. The currently active process of a process pair in the NonStop Kernel
operating system environment. See also process pair.
procedure call. A method of invoking, from within a program, one of many system services.
Some of these services can be applied to TMF transactions.
process pair. A fault-tolerant arrangement of processes in the NonStop Kernel operating
system environment, whereby two processes in separate processors share the same
name and execute identical code. One process functions as the primary process and
the other functions as the backup process. The two processes are kept in sync through
checkpoint messages sent from the primary to the backup process. If the primary
process fails, the backup process is notified that it is now the primary, and it resumes
the application work from the last valid checkpoint message.
R
$RECEIVE. The file through which a process receives and replies to messages from other
processes.
recoverable resource manager. A resource manager that represents data that can be
recovered after a failure. This type of resource manager must be registered with TMF
in the resource manager directory before it can be opened by a gateway process.
recovery. The returning of a database file or files to a consistent state.
recovery mode. See online recovery mode and archive recovery mode.
redo-needed file. An audited file that contains changes that must be reapplied because
they were written to cache but not yet transmitted to disk. Such files cannot be opened.
To recover them, you must use the file recovery process.
Remote Database Facility (NonStop RDF). A software product that enables disaster
tolerance for OLTP production databases, monitors database updates audited by TMF
on a source system, and applies those updates to a copy of the database on a target
system.
remote. Outside the local environment. For TMF, a transaction, transaction branch, or
transaction manager outside the home node. For example, if a distributed transaction
originates on node A and also does work on node B, the TMF system on node A is the
local transaction manager and the TMF system on node B is the remote transaction
manager.
remote node. A system, other than the home node, accessed by a distributed transaction.