CA Quickfetch Modernization Guide

CA Quickfetch dynamically copies frequently used load modules into memory, reducing load processing time. It operates similarly to VLF but is specifically designed for load modules.

CA Quickfetch automatically detects changes to load modules and refreshes the in-memory copy. This ensures that the most up-to-date version of the module is always used.

CA Quickfetch provides an ISPF interface to view performance statistics related to load module usage and the effectiveness of the dynamic caching.

While CA Quickfetch can operate independently, it is often used in conjunction with CA PMO (Performance Management Option) to provide a more comprehensive performance management solution.

CA Quickfetch intercepts load requests and checks if the requested module is already in memory. If it is, the module is loaded directly from memory, bypassing the normal load process. If not, the module is loaded from disk and then copied into memory for subsequent requests.

The configuration files used by CA Quickfetch define which load libraries are eligible for dynamic caching and specify parameters such as the maximum amount of memory to use. These files are typically maintained by system programmers.

CA Quickfetch uses standard z/OS system services for memory management and load module processing. It does not typically expose external APIs for direct integration.

The main components of CA Quickfetch include the intercept routine (which intercepts load requests), the memory manager (which manages the in-memory copy of load modules), and the ISPF interface (which provides performance monitoring).

By reducing load processing time, CA Quickfetch can improve application response times and overall system performance. This can lead to increased user productivity and reduced operational costs.

CA Quickfetch can help reduce CPU utilization by minimizing the number of disk I/O operations required to load modules. This can free up CPU resources for other tasks.

Faster application startup times can improve the user experience and reduce the time it takes to complete business transactions.

CA Quickfetch relies on the security mechanisms provided by z/OS. It does not introduce its own authentication methods.

Access to the ISPF interface and the ability to modify CA Quickfetch configuration files should be restricted to authorized personnel only. This can be achieved through standard z/OS security controls.

CA Quickfetch does not encrypt load modules in memory. The security of the load modules relies on the underlying z/OS security mechanisms.

CA Quickfetch logs events related to load module caching and retrieval. These logs can be used for auditing and troubleshooting purposes.

CA Quickfetch is administered through configuration files and the ISPF interface. The configuration files define the parameters for dynamic caching, while the ISPF interface provides monitoring and control functions.

User management is handled through standard z/OS security mechanisms. CA Quickfetch does not have its own user management system.

Key configuration parameters include the maximum amount of memory to use for caching, the list of load libraries to include in the cache, and the criteria for determining which modules to cache.

CA Quickfetch provides logging and monitoring capabilities through the ISPF interface. This allows administrators to track the performance of the cache and identify any issues.