Air Cleaner User Manual

number ensures that the receiving channel can
reestablish the message sequence when storing the
messages.
server. (1) In MQSeries, a queue manager that
provides queue services to client applications running
on a remote workstation. (2) The program that
responds to requests for information in the particular
two-program, information-flow model of client/server.
See also client.
server channel. In message queuing, a channel that
responds to a requester channel, removes messages
from a transmission queue, and moves them over a
communication link to the requester channel.
server connection channel type. The type of MQI
channel definition associated with the server that runs
a queue manager. See also client connection channel type.
service interval. A time interval, against which the
elapsed time between a put or a get and a subsequent
get is compared by the queue manager in deciding
whether the conditions for a service interval event have
been met. The service interval for a queue is specified
by a queue attribute.
service interval event. An event related to the service
interval.
session ID. In MQSeries for OS/390, the CICS-unique
identifier that defines the communication link to be
used by a message channel agent when moving
messages from a transmission queue to a link.
shared inbound channel. In MQSeries for OS/390, a
channel that was started by a listener using the group
port. The channel definition of a shared channel can be
stored either on page set zero (private) or in the shared
repository (global).
shared outbound channel. In MQSeries for OS/390, a
channel that moves messages from a shared
transmission queue. The channel definition of a shared
channel can be stored either on page set zero (private)
or in the shared repository (global).
shared queue. In MQSeries for OS/390, a type of local
queue. The messages on the queue are stored in the
coupling facility and can be accessed by one or more
queue managers in a queue-sharing group. The definition
of the queue is stored in the shared repository.
shared repository. In MQSeries for OS/390, a shared
DB2 database that is used to hold object definitions that
have been defined globally.
shutdown. See immediate shutdown, preemptive
shutdown, and quiesced shutdown.
signaling. In MQSeries for OS/390 and MQSeries for
Windows 2.1, a feature that allows the operating
system to notify a program when an expected message
arrives on a queue.
single logging. A method of recording MQSeries for
OS/390 activity where each change is recorded on one
data set only. Contrast with dual logging.
single-phase backout. A method in which an action in
progress must not be allowed to finish, and all changes
that are part of that action must be undone.
single-phase commit. A method in which a program
can commit updates to a queue without coordinating
those updates with updates the program has made to
resources controlled by another resource manager.
Contrast with two-phase commit.
SIT. System initialization table.
stanza. A group of lines in a configuration file that
assigns a value to a parameter modifying the behavior
of a queue manager, client, or channel. In MQSeries on
UNIX systems, MQSeries for OS/2 Warp, and
MQSeries for Windows NT, a configuration (.ini) file
may contain a number of stanzas.
storage class. In MQSeries for OS/390, a storage class
defines the page set that is to hold the messages for a
particular queue. The storage class is specified when
the queue is defined.
store and forward. The temporary storing of packets,
messages, or frames in a data network before they are
retransmitted toward their destination.
subsystem. In OS/390, a group of modules that
provides function that is dependent on OS/390. For
example, MQSeries for OS/390 is an OS/390
subsystem.
supervisor call (SVC). An OS/390 instruction that
interrupts a running program and passes control to the
supervisor so that it can perform the specific service
indicated by the instruction.
SVC. Supervisor call.
switch profile. In MQSeries for OS/390, a RACF
profile used when MQSeries starts up or when a
refresh security command is issued. Each switch profile
that MQSeries detects turns off checking for the
specified resource.
symptom string. Diagnostic information displayed in
a structured format designed for searching the IBM
software support database.
synchronous messaging. A method of communication
between programs in which programs place messages
on message queues. With synchronous messaging, the
Glossary
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MQSeries MQSC Command Reference
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