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TMF Glossary
child
child. For distributed transactions, the transaction manager that receives and performs work
on behalf of another transaction. The transaction manager that sends the work is
known as the parent. During the course of the transaction, a child may send a
transaction to yet another transaction manager, therefore becoming a parent in the
new relationship (but remaining a child in the previous relationship). Contrast with
parent.
child node. A node that receives and performs work on behalf of a distributed transaction.
The node that sends the transaction to the child node is known as the parent node.
During the transaction, the child node may send the transaction to yet another node,
becoming a parent node (but remaining a child node in the previous relationship).
Contrast with parent node.
client. A software process, hardware device, or combination of the two that requests
services to be performed by a server. Often, the client is a process residing on a
programmable workstation and is the part of an application that provides the user
interface. The workstation client might also perform other portions of the application
logic. In discussions of the Pathway environment, this term refers to the part of an
application that runs in an environment other than the NonStop operating system, such
as a personal computer, Macintosh computer, UNIX workstation, or mainframe
computer, and makes requests of a server process. See also requester and server.
client application. An application running on a client workstation accessing data on a
server. A client application is sometimes called a client.
client/server model. A model for distributing applications. In general, but not always, in this
model the client process resides on a workstation and the server process resides on a
second workstation, minicomputer, or mainframe computer. Communication takes the
form of request and reply pairs, which are initiated by the client and serviced by the
server. (A server can make requests of another server, thus acting as a client.)
Client/server computing is often used to connect different types of workstations or
personal computers to a host computer by means of supported communications
protocols.
client/transaction server model. A model for client/server applications. The
client/transaction server model is the model of choice for high-volume OLTP
applications in which transaction volume is great and processing requirements change
infrequently.
In the NonStop server environment, an application following this model divides
processing between a client running on a workstation and servers running on a
NonStop server. The client handles the user interface and business logic and
processing. The servers store information for use by the client and handle database
input and output functions. Interprocess communication (IPC) messages transfer data
between client and server.
HP NonStop TMF Glossary — 540135-001
Glossary -4
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