Overview

CA IDMS provides both database and data communications services for the development and execution of applications in multi- and single-user environments. Development, production, and end-user systems coexist in the CA IDMS environment.

Components

CA IDMS components include the following:

Database management system
CA IDMS/DC or CA IDMS UCF (DC/UCF)
Dictionaries
Physical database definition
Logical database definition

Types of Operation

The CA IDMS environment supports three types of operation:

Multiuser—Implemented through CA IDMS/DC or CA IDMS UCF central version
Single-user—Implemented through local mode
Data Sharing—Implemented as two or more CA IDMS/DC or CA IDMS UCF central versions operating cooperatively through coupling facility services

Online programs always access the database using central version services. Batch programs can access the database either under central version or in local mode. Batch or online TP-monitor programs other than CA IDMS/DC running in another address space communicate with central version through facilities provided by CA IDMS.