IMS HP Change Accumulation Utility features and benefits

IMS HP Change Accumulation Utility is a high performance tool that can merge the most recent database changes quickly, safely, and accurately while reducing the I/O, CPU time, and elapsed time that is required to build change accumulation data sets.

Jobs that might normally take hours are easier to perform and are processed in a fraction of the time. IMS HP Change Accumulation Utility protects your data, saves database administrator resources, and reduces supplementary software costs. By conducting change accumulation procedures regularly between image copies, you can ensure your ability to restore business-critical data in the event of a disaster.

IMS HP Change Accumulation Utility improves the performance of IMS change accumulation merge operations by running multiple change accumulation groups in parallel rather than in sequence and streaming the output to each group simultaneously.

IMS HP Change Accumulation Utility also enables you to extract database updates with one pass of the data, which minimizes the need for manual intervention. By using your existing DBRC GENJCL statements, IMS HP Change Accumulation Utility can automatically generate the required JCL.

Product features

IMS HP Change Accumulation Utility provides the following features:

• Simplified setup and configuration using a single address space
• Point-in-time change accumulation
• Priority scheduling
• In-memory spill files that use 64-bit addressing
• Cache storage management
• Reduction or elimination of cross-memory data transfers
• All processing to be completed within a single address space
• Additional options that extend IMS/CA functionality

Product benefits

IMS HP Change Accumulation Utility provides the following benefits:

• Provides an easy-to-use interactive system productivity facility interface (ISPF) for setup and operation

  Alternative batch and extended batch interfaces are also provided.

• Can use custom or standard JCL procedures for processing job tasks

  Manual modification of JCL is not required.

  Multiple methods are available for scheduling JCL to be run.

• Provides a single point of control and reporting
• Enables you to quickly perform change accumulation for multiple change accumulation groups
• Reduces the need for manual intervention during the change accumulation process
• Allows you to reuse your existing IMS Database Recovery Control (DBRC) input stream processes to minimize additional setup
• Allows reuse of most DBRC skeletons without modification
• Leverages the latest technology to maximize the number of processes that can run concurrently
• Helps you efficiently manage resource consumption by limiting the number of parallel processes

  Performance controls allow some change accumulation groups to be processed serially when you need to allot CPU resources to other projects.

• Using IMS DBRC to determine which log files need to be read, which ensures that no data is omitted from the recovery process