Licensed functions are functions of the operating system and of the storage system. There are both required and optional features. This chapter describes how the Copy Services licensing works for the DS8000 Series.

This chapter covers the following topics:

All DS8000 Series machines must have an Operating Environment License (OEL) for the total storage that is installed, as defined in gross decimal TB. With the current DS8000 licensing schema, the OEL is part of the Base Function license bundle.

Licensed functions are available in the following bundles:

The Base Function license is required for each DS8880 storage system. The license needs to be equal to or greater than the total physical capacity of the storage system. Select the full raw capacity and order the number of TBs to support the total physical capacity of your storage system.

The licensed functions include:

The z-synergy Services include z/OS functions that are supported on the storage system such as:

The license can be equal to or less than the total physical capacity of the storage system, but order less only if you have a mixed machine FB/Open Systems and count key data (CKD)/mainframe systems. You need to license the full CKD/z Systems raw capacity for z/OS (that is, the physical capacity of all ranks that will be formatted as CKD ranks).

Copy Services features help you implement storage solutions to keep your business running 24 hours a day, 7 days a week by providing data duplication, data migration, and disaster recovery functions. The Copy Services bundle includes functions such as:

The license can be equal to, less than, or more than the total physical capacity of the storage system. You need to license the TBs that you actually use in copy relationships.

The IBM Copy Services Manager on Hardware Management Console license enables IBM Copy Services Manager Basic Edition to run on the Hardware Management Console, which eliminates the need to maintain a separate server for Copy Services function.

The DS8000 license scope is detailed in Table 2-1.

An increase in license capacity is concurrent. A deactivation (or decrease in license capacity) takes place only after one additional machine IML. Similar considerations apply to the license scopes:

If you plan to practice regular site swap operations or deploy an Active/Active or Active/Standby type of configuration, the licensing and scope are required at local and remote storage systems.

In most cases, the total capacity that is installed must be licensed. This capacity is the total capacity in decimal TB equal to or greater than the actual capacity installed, including all RAID parity disks and hot spares.

An exception might be where a mix of both z Systems and Open Systems hosts are using the same storage system. In this case, it is possible to acquire Copy Services Bundle license for just the capacity that is formatted for CKD, or just the capacity that is formatted for FB storage. This situation implies that the licensed Copy Services function is required only for Open Systems hosts, or only for z Systems hosts. If, however, a Copy Services function is required for both CKD and FB, that Copy Services license must match the total configured capacity of the machine. For example, when a DS8000 where the actual capacity is 15 TB used for both CKD and FB, the scope for the Base Function license is ALL.

If the client splits storage allocation with 8 TB for CKD and only CKD storage is using Copy Services, the scope type for the Copy Services license can be set to CKD. This situation means that no Open Systems hosts can use the FlashCopy function. Now the Copy Services license can be purchased at the CKD level of 8 TB. Refer to Table 2-2 for information about license function for the DS8000.

You can order the Copy Services license to support the total usable capacity of all volumes that are involved in one or more copy services functions. However, this sort of subcapacity licensing (less than the total physical raw capacity) requires capacity monitoring and a steady remote connection on the client side.

By using a remote connection for call home, the Copy Services license can be based on the usable capacity of the volumes that will potentially be in Copy Services relationships. This amount typically is less than the total physical capacity.

For example, with overprovisioning, if the total rank usable capacity of a DS8880 is 100 TB but 200 TB of thin-provisioning volumes are in Metro Mirror, only a 100 TB of Copy Services license is needed.For FlashCopy volumes, you need to count the source plus target volumes as usable capacity.

The Copy Services license goes by the usable capacity of all volumes that are involved in at least one Copy Services relationship. If overprovisioning is used on the DS8880 with a significant amount of Copy Services functionality, the Copy Services license needs to be equal to the total rank usable capacity only. This is true even if the logical volume capacity of volumes in Copy Services is greater.

The following examples are provided to illustrate your Copy Services licensing requirements using TB as the capacity measurement:

However, consider that with Metro/Global Mirror, certain scenarios can require more FlashCopy targets on the local machines, larger Copy Services capacity is necessary.

Because of the new licensing bundle, it is more important that all copy services functions are properly protected to prevent unexpected copy services capacity usage.

Previously, when each individual capability or function came with an individual license, the management of what functions could not be used was simple if you did not have the license. With the new bundle, the recommendation is to ensure proper controls are put in place to ensure there is no unexpected use of copy services where none was expected (for example, some software will use FlashCopy by default if it is available).

Controls are available in several forms such as:

Some of these control mechanisms are outlined in Chapter 5, “z Systems interfaces” on page 27.