Allocation Control Center (ACC)  

The Allocation Control Center provides complete control over the creation and placement of SMS-managed and non-SMS data. ACC allows installations to easily define policies which implement standards for dataset naming, device type, volume selection, and space usage.

Because the DFSMS ACS routines rely on the existence of well-defined standards, they are a crucial factor in successful implementation of system-managed storage.

ACC then goes beyond standards enforcement to provide advanced features that aid administrators and users in making the most effective use the storage subsystem.


Enforce Dataset Standards.
ACC allows datasets to be created using existing naming conventions and characterics while warning of potential errors during the transition to new standards.

ACC’s extensive SMF recording, messaging, simulation, and logging facilities make it easy to track and report violations while allowing JCL to be modified “on-the-fly” to meet installation requirements.

Control Dataset Placement.
ACC can make the datasets go where you want! Whether it is directing small tape files to DASD, establishing disk pools, migrating to new device types, or selecting volumes for use based on performance characteristics or space availability, ACC can place datasets where they are best suited, without the need for users to change JCL or programs.

SMS Extensions.
ACC doesn’t stop with improving standards enforcement or controlling dataset creation. Storage and database administrators can benefit from extensions designed to make system-managed storage easier to use.

   “Keep-Away” algorithm eliminates the need to use guaranteed-space storage classes to place performance-sensitive SMS-managed datasets such as DB2 tablespaces.

   Real-time ACS tracing allows users to answer the question “Why is this dataset on this volume?” by providing a line-by-line trace of the logic used by the DFSMS ACS routines to assign SMS classes

ACC Example1
Changing TAPE to DISK without changing JCL
In today's data centre, DASD has become much less expensive and with personnel cost increasing it is sometimes more cost effective to use DISK.

ACC can be used to reroute the data set to a disk volume and then add disk related parameters such as the SPACE parameter without changing any of your JCL.

    ACC Example2
Pooling Enhancements
ACC provides for extensive, Sub Pooling, Alternate Pools and Alternate Volume Selection Algorithms.
    ACC Example3
Migrating to new device types using ACC
MVS requires you to change your JCL when unit type changes, such as when going from reel to cartridge tapes or going from 3380 to 3390 DASD devices.

ACC can make this task quicker and simpler, while helping you avoid JCL errors during migration to new devices.

ACC Extras

Download ACC Information
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