TMF Glossary (G06.24+)

TMF Glossary
HP NonStop TMF Glossary—522415-002
Glossary-12
online recovery mode
online recovery mode. The data volume recovery mode in which TMF maintains a
sufficient number of audit trail files on disk for volume recovery. Compare with archive
recovery mode.
online transaction processing. A method of processing transactions in which entered
transactions are immediately applied to the database. The information within the
database is readily available to all users through online screens and printed reports.
The transactions are processed while the requester waits, as opposed to queued or
batched transactions, which are processed at a later time.
Online transaction processing can be used for many different kinds of business tasks
such as order processing, inventory control, accounting functions, and banking
operations.
overflow-audit volume. A disk volume configured to store audit-trail files when an active-
audit volume, managed by TMF, becomes too full.
Space on an overflow-audit volume is used only in extreme cases, such as when there
is no tape available or no disk space available for an audit dump, or when generation
of audit records suddenly increases, which causes the active-audit volumes to fill
before the oldest audit-trail file is no longer needed.
The default overflow-audit volume name is $AUDIT (the same as the active-audit
volume).
overflow threshold. A configurable parameter for an audit trail that specifies the
percentage of the active audit volumes' capacity that can be used before TMF copies
the oldest audit trail files to the overflow audit volumes.
P
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.