- Application Development System/Online (ADS/Online)
- C.A.'s programming productivity tool, using a 4th generation language and running under IDMS-DC/UCF. ADS/Online enables users to develop and execute online applications for the query and update of the database.
- Archiving
- The storage of backup files and associated journals, usually
for a given period of time.
- Area
- A logical subdivision of the database that consists of a group of database pages that can reside on several physical files.
- Automatic System Facility (ASF)
- An IDMS/R tool used to define and manipulate relational tables.
- Block
- A physical unit of storage in a file recorded on tape or disk.
- Buffer
- A temporary storage area for data used to compensate for difference in rate of flow of data when data is transmitting from one device to another.
- Central Version (IDMS-DC)
- A mode of operation under IDMS/R that allows many application programs to execute concurrently and to share a single DBMS by channelling requests from the programs through a supervisor call to a service module present in the central version for each application program.
- Checkpoint
- An entry in the journal file that defines a position after which run-unit updates to the database can be reversed during recovery.
- Computer Associates, Inc
- The software company that writes, maintains and sells the IDMS/R software.
- Concurrent
- In multiprogramming, processing of operations rotates between different programs, giving the illusion of simultaneous processing.
- CULPRIT
- C.A.'s general-purpose report generator.
- Database
- A secondary storage facility in which all data is centralized and arranged independently of applications.
- Database Administrator (DBA)
- A member of the Database Administration staff responsible for the maintenance of the IDSM/R database management system.
- Database Management System (DBMS)
- IDMS/R-supplied object modules that perform database services such as physical database access database I/O, and space management functions.
- Dictionary/Directory
- The central storage facility provided by IDMS/R for maintaining source information on data descriptions and relationships.
- Distributed Database System (DDS)
- The C. A. networking system that allows distribution of data
and applications among multiple mainframe computers.
- External Run Unit (ERUS)
- Any program that executes in regions/partitions separate from that in which the IDMS-CV/DC system executes. Communication between the two regions/partitions takes place through an IDMS/R SVC.
- File
- A physical unit of storage in which blocks are placed.
- High Level Language
- A problem-oriented language that requires little knowledge of the computer on which a computer program written in the language is to be run.
- IDMSAJNL Utility
- The IDMS/R utility used to offload all journal entries to a backup file.
- IDMS-DC
- The TP monitor fully integrated with IDMS/R and designed for efficient processing of online, transaction-oriented applications.
- Infogate
- C.A.'s set of integrated decision support tools for use on an IBM Personal Computer. The tools include relational database, electronic spreadsheet, graphics, document processing and electronic mail capabilities.
- Information Database (IDB)
- The C.A. product that links INFOGATE to the mainframe, providing decision makers with direct access to the corporate data resource for use with the INFOGATE tools.
- Input/Output (I/O)
- Pertaining to a device or to a channel that may be involved in an input process, and at a different time, in an ouput process.
- Integrated Data Dictionary (IDD)
- A C.A. software product that can be used to supplement the information provided to the dictionary/directory by IDMS/R and to generate a wide range of standard and non-standard reports.
- Integrated Database Management System/Relational (IDMS/R)
- A C.A. software product that acts as an intermediary between user application programs and information stored in a database.
- Journal
- A file that is defined for the database through the schema or DMCL. It stores checkpoints as well as before and after database record images for record occurrences updated during processing.
- Line Driver
- A program that is part of IDMS-DC. Its purpose is to translate
data between terminals and programs.
- Load Module
- The output of the linkage editor a program in a format suitable
for loading into virtual storage for execution.
- Local Mode
- An operating mode under IDMS/R in which each batch program
uses a dedicated copy of the DBMS.
- Log
- A file that contains IDMS-CV/DC system messages, snap dumps,
trace information, and task statistics for billing.
- Nucleus
- That part of IDMS-CV that is resident in main storage.
- Object Code
- The machine language program that a compiler produces from
the programmer's source program.
- Online Query (OLQ)
- The conversational system designed for application developers
and end users to retrieve information from an IDMS/R database.
- Overhead
- The time that the computer spends keeping the system going,
instead of working on somebody's program.
- Page
- A logical division of the database that corresponds to a physical
block in a file.
- Partition
- In multiprogramming, the primary storage area reserved for
one program may be fixed or variable in size see also Region.
- Program Pool
- The area within the IDMS-CV/DC region where executable programs
are loaded into.
- Program Temporary Fix (PTF)
- Instructions published by a vendor for the elimination of a 'bug' in some software component. PTF's may be applied manually or via a PTF tape issued by the vendor.
- Record
- The basic building block of an IDMS/R database.
- Record Lock
- Under the central version, a lock placed on a record occurrence
to prevent access to that record occurrence and/or update that
record occurrence.
- Recovery Unit
- That part of a run unit that falls between two checkpoints.
- Region
- In multiprogramming with a variable number of tasks, a term
often used to mean the internal storage space allocated a variable-size
partition.
- Relational
- A technique for viewing the database by means of tables.
- RHDCPRLG Utility
- The IDMS/R utility which prints and/or offloads to tape or
disk the contents of the Log area of the CV.
- Rollback
- When a recovery unit fails, IDMS-CV automatically recovers
the run unit by rolling back the recovery unit. This recovery
occurs while the CV continues to process other active run units.
- Run Time
- The elapsed time taken for the execution of a program. Synonymous
with run duration.
- Run Unit
- That portion of IDMS/R processing that is accessing the database.
An IDMS-CV/DC program can have more than one run unit associated
with it.
- Schema
- That part of the database definition that describes the entire
content and structure of the database.
- Set
- The relationship which exists between records.
- Snap Dump
- A printout of intermediate results partway through the program run. A handy debugging aid.
- Source Code
- The program that the programmer writes in high-level language.
It must be turned into machine language before it can be executed.
- Storage Pool
- The area within the IDMS-CV/DC region used as work-space by
programs in execution.
- Subschema
- That part of a database definition, to be viewed by particular
applications, that describes all or a subset of the data elements,
record types, set types, and areas defined in the schema.
- Supervisor
- The major component of the operating system. It coordinates
the activities of all other parts of the operating system.
- Supervisor Call (SVC) Routine
- An IDMS/R program that passes control information across regions/partitions
between the application program and the IDMS-CV system.
- SYSCTL File
- Run-time parameters used to point bach programs to particular
central version.
- SYSGEN (system generation)
- The process of selecting optional parts of an operating system
and of crating a particular operating system tailored to the requirements
of a data processing installation.
- Task
- A unit of work in IDMS-CV/DC.
- Teleprocessing Monitor
- A program product that enables transactions entered at remote
terminals to be processed concurrently by user-written application
programs. It also includes facilities for building, using, and
maintaining databases.
- Track
- Information is recorded on the surface of a magnetic disk
in a series of concentric circles. Each of these is called a track.
- Universal Communications Facility (UCF)
- The C.A. facility that permits operation of IDMS/R online
applications under any TP monitor.
- Userprod
- Used to store backup programs, JCL and procedures of our user's. The item to be backed up is first put into USERTEST and the LIBRARIAN ADD REQUEST FORM is filled out and given to the Librarian for moving to USERPROD.
- Valid Condition Code
- A non-zero codition code in the job step of the JCL that should not cause an abend. Valid condition codes get listed on Form 52.
- Warmstart
- If IDMS-CV comes down abnormally, a warmstart is performed automatically at startup that restores all recovery units active at the time.
