TMF Glossary (G06.26+)

TMF Glossary
HP NonStop TMF Glossary—522415-003
Glossary-13
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parent. For distributed transactions, the transaction manager that sends a portion of a
transaction to another transaction manager to perform work on it. The transaction
manager that receives the transaction is known as the child. During the course of the
transaction, a child may send the transaction to yet another transaction manager,
therefore becoming a parent in the new relationship (but remaining a child in the
previous relationship). Contrast with child.
parent node. A node that sends a distributed transaction to another node to perform work
on it. The node that receives the transaction is known as the child node. During the
course of the transaction, a child node may send the transaction to yet another node,
therefore becoming a parent node in the new relationship (but remaining a child node
in the previous relationship). Contrast with child node.
partition. A partitioned file is one that is physically spread over two or more disk volumes. A
partition is that portion of a partitioned file that resides on a particular disk volume.
Pathsend facility. A set of NonStop Kernel operating system procedure calls and the
LINKMON process, which work together to provide general access to Pathway server
classes from any process on a NonStop system.
Pathway/TS. An HP product that provides tools for developing and interpreting screen
programs to support OLTP applications in the NonStop Kernel operating system
environment on NonStop systems. Pathway/TS screen programs communicate with
terminals and intelligent devices. Pathway/TS includes the TCP, the SCREEN COBOL
interpreter and run-time environment, and the SCREEN COBOL Utility Program
(SCUP). It requires the services of the NonStop TS/MP product. See also NonStop
Transaction Services/MP (TS/MP).
physical file name. The internal file name that the DP2 disk process uses to identify any
file.
pinned file. An audit trail file that cannot be reused or purged from the active audit volume
because it contains or is receiving active audit information, it may be needed to recover
an active transaction, or it may be needed to restart TMF.
PIO. Packet I/O. PIO is like a message with a remote procedure call on the other end, with
the target being a cpu and interrupt service calling BUSRECEIVE-> TMFLibrary calls.
PIO buffering. The boxcarring of PIO messages to the delivery target, and unmarshalling at
the target in the proper order, to amortize the overhead of memory channel
transmissions on both ends by way of processor prefetch, sender dispatches,
communications, and interrupt service on the receiver end.
preallocated audit trail file. An allocated file used to guarantee that disk space configured
for the audit trail is not consumed by other applications. TMF eventually renames such
files as new audit trail files.