Adabas Caching Facility

The architecture of Adabas Caching Facility (ACF) is designed for high performance and efficient data management within the ADABAS environment. The main components include the Cache Manager, Data Retriever, and Control Interface. The Cache Manager is responsible for managing the cache, including data storage, retrieval, and eviction policies.

It uses a combination of algorithms to optimize cache performance, such as Least Recently Used (LRU) for cache entry eviction. The Data Retriever is responsible for fetching data from the ADABAS database when a cache miss occurs. It interacts with the ADABAS database using optimized access methods to minimize latency.

The Control Interface provides a command-line interface (CLI) for administrative tasks, such as starting and stopping the cache, monitoring performance, and configuring settings. The CLI also provides detailed performance metrics, including cache hit ratios, data access times, and error logs. ACF uses internal, proprietary communication protocols optimized for high-speed data transfer between its components.

Configuration is managed through configuration files, allowing administrators to set parameters such as cache size, data loading policies, and refresh intervals. Security is integrated with the operating system's security features, such as RACF, for authentication and access control. ACF supports various monitoring tools and logging mechanisms to provide comprehensive insights into cache performance and system behavior.

For example, the `ACF FLUSH` command can be used to flush the cache.