IBM DS8880 Series, Introduction And Planning Manual

Page: 132 / 244

The Encryption Authorization feature secures data at rest and offers a simple,
cost-effective solution for securely erasing any disk drive that is being retired or
re-purposed (cryptographic erasure). The storage system uses disks that have FDE
encryption hardware and can perform symmetric encryption and decryption of
data at full disk speed with no impact on performance.
IBM Easy Tier
Support for IBM Easy Tier is available with the IBM Easy Tier feature.
The Easy Tier feature enables the following modes:
v Easy Tier: automatic mode
v Easy Tier: manual mode
The feature enables the following functions for the storage type:
v
Easy Tier application
v Easy Tier heat map transfer
v The capability to migrate volumes for logical volumes
v The reconfigure extent pool function of the extent pool
v The dynamic extent relocation with an Easy Tier managed extent pool
I/O Priority Manager
The I/O Priority Manager function can help you effectively manage quality of
service levels for each application running on your system. This function aligns
distinct service levels to separate workloads in the system to help maintain the
efficient performance of each DS8000 volume.
The I/O Priority Manager detects when a higher-priority application is hindered
by a lower-priority application that is competing for the same system resources.
This detection might occur when multiple applications request data from the same
drives. When I/O Priority Manager encounters this situation, it delays
lower-priority I/O data to assist the more critical I/O data in meeting its
performance targets.
Operating environment license
The operating environment model and features establish the extent of IBM
authorization for the use of the IBM DS operating environment.
To determine the operating environment license support function, see “Machine
types overview” on page 4.
Thin provisioning
Thin provisioning defines logical volume sizes that are larger than the physical
capacity installed on the system. The volume allocates capacity on an as-needed
basis as a result of host-write actions.
The thin provisioning feature enables the creation of extent space efficient logical
volumes. Extent space efficient volumes are supported for FB and CKD volumes
and are supported for all Copy Services functionality, including FlashCopy targets
where they provide a space efficient FlashCopy capability.
120
DS8880 Introduction and Planning Guide