Lock Management › Controlling Access to CA IDMS Databases

Controlling Access to CA IDMS Databases

Factors Controlling Access to Data

The primary means of influencing how CA IDMS/DB controls access to data is in the way areas are readied and the status assigned to areas within a central version. These factors ultimately determine which transactions can access and update data within a CA IDMS database and whether concurrent access is controlled at the area or record occurrence level.

The remainder of this section discusses:

• Readying areas
• The status of areas under the central version
• Default ready modes
• Ready modes and SQL access to data

Later sections in this chapter discuss how these factors determine the types of locks CA IDMS uses to control access to data.