- garbage
collection
- Part of a language's run-time system or an add-on library
that automatically determines the memory that a program no longer uses, and
recycles it for other use. Garbage collection may be assisted by the compiler,
the hardware, the operating system, or any combination of the three.
- GDDM
- See Graphical Data Display Manager (GDDM)
- GDS
- See generalized data stream (GDS)
- generalized data stream (GDS)
- The SNA-defined data stream format
used for basic conversation on APPC sessions.
- Generalized Performance Analysis Reporting (GPAR)
- A tool designed
as a base for reporting on the performance of IBM or user-written programs.
- generalized sequential access method (GSAM)
- In IMS, an access
method that supports simple physical sequential data sets, for example, SYSIN,
SYSOUT, and tape files.
- generalized trace facility (GTF)
- In MVS, a trace data-collection routine.
- general log
- A general purpose log stream used by CICS for any of the following:
forward recovery logs, autojournals, or user journals. See also system log.
- general resource
- In RACF, any system resource, other than an MVS
data set, that is defined in the class descriptor table (CDT). On MVS, general
resources include DASD volumes, tape volumes, load modules, terminals, IMS;
and CICS transactions and other CICS resources, and installation-defined resource
classes. See also class.
- generate
- To produce a computer
program by selection of subsets from skeletal code under the control of parameters.
- generation feature
- In CICS/VSE, an IBM licensed program order
option used to tailor the object code of a program to user requirements.
- generic alert
- A Systems Network Architecture (SNA) Network Management
Vector that enables a product to signal a problem to the network. CICSPlex
SM uses generic alerts as part of its interface to NetView.
- generic applid
- In XRF, the name by which the active-alternate pair of CICS systems
is known to the end user. In VTAM terms, this is the USERVAR. The generic
name is also used in intersystem communication. See also specific applid and application identifier (VTAM applid).
- generic data identifier
- In
CICS, a 1-to-8 character alphanumeric name consisting of the common leading
characters of a group of temporary storage queue names for which recovery
is required.
- generic gate
- Gives access to a set of functions that are provided
by several domains.
- generic key
- In systems with VSAM, a leading
portion of a key, containing characters that identify those records that are
significant for a certain application. The key is one or more consecutive
characters, taken from a data record, used to identify the record and establish
its order with respect to other records.
- generic profile
- In RACF, a profile that can provide protection for one or more resources.
The resources protected by a generic profile have similar names and identical
security requirements. For example, a generic data set profile can protect
one or more data sets. See also data set profile, discrete profile, resource profile.
- GETVIS space
- In CICS/VSE, storage space
within a partition or the shared virtual area, available for dynamic allocation
to programs.
- GID
- See group ID.
- global access checking
- In RACF,
the ability to allow an installation to establish an in-storage table of default
values for authorization levels for selected resources. RACF refers to this
table prior to performing normal RACHECK processing, and grants the request
without performing a RACHECK if the requested access authority does not exceed
the global value. Global access checking can grant the user access to the
resource, but it cannot deny access.
- global catalog
- A
system data set in which CICS records CICS system information. See also local catalog.
- global catalog domain
- Together
with the local catalog domain, a repository used by other CICS domains to
hold information to allow an orderly restart. The two catalog domains enable
CICS code to read, write, and purge records on the global and local catalog
data sets so that a record of the CICS state can be maintained when CICS is
not running.
- global resource serialization (GRS)
- A form of global data set
enqueuing. In an XRF environment in which the active and alternate pair of
CICS systems are running in different MVS images, GRS can be used (1) to enable
the sharing of a CSD between the active and alternate (2) to reduce the risk
of data integrity problems caused by concurrent execution of DB2 on the active
and alternate.
- global trap/trace exit
- A problem-determination function controlled
by the CSFE CICS transaction. See also timer and trace.
- global user exit
- A point in a CICS module at which CICS can pass
control to a user-written program (known as an exit point program),
and then resume control when the program has finished. When an exit program
is enabled for a particular exit point, the program is called every time the
exit point is reached. See also task-related user exit (TRUE).
- global
work area (GWA)
- An area provided by CICS for a user exit program
when the user exit program is enabled.
- global zone
- Logical
division of the SMP/E consolidated software inventory (CSI).
- goal mode
- A workload management mode for an MVS image in a sysplex using an MVS workload
management service definition to automatically and dynamically balance its
system resources according to the active service policy for the sysplex.
- GPAR
- See Generalized Performance Analysis Reporting (GPAR).
- Graphical
Data Display Manager (GDDM)
- A function of the operating system
that processes both text and graphics for output on a display, printer, or
plotter.
- group
- In RACF, a collection of users who can share access authorities
for protected resources. In resource definition online, a collection of related
resources. The main purpose of an RDO group is convenience in storing definitions
in the CSD.
- group authority
- Authority to use objects, resources, or functions
from a group profile.
- group data set
- On MVS, a RACF-protected
data set in which either the high-level qualifier of the data set name or
the qualifier supplied by an installation exit routine is a RACF group name.
See also user data set.
- group ID (GID)
- In the Resource
Access Control Facility (RACF), a string of one to eight characters that identifies
a group. The first character must be A through Z, #, $, or @. The rest can
be A through Z, #, $, @, or 0 through 9.
- group profile
- A profile
that provides the same authority to a group of users.
- group-related user attribute
- In RACF, a user attribute assigned
at the group level, that allows the user to control the resource, group, and
user profiles associated with the group and its subgroups.
- group terminal
option
- In RACF, a function that allows users within a group to
log on only from those terminals that they have been specifically authorized
to use.
- GRS
- See global resource serialization (GRS).
- GSAM
- See generalized sequential access method (GSAM).
- GTF
- See generalized trace facility (GTF).
- GWA
- See global work area (GWA).
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