striping volumes across arrays in the pool. Existing volumes can be
reconfigured nondisruptively by using manual volume migration and
volume rebalance.
The storage pool striping function is provided with the DS8000 series at no
additional charge.
Performance statistics
You can use usage statistics to monitor your I/O activity. For example, you
can monitor how busy the I/O ports are and use that data to help manage
your SAN. For more information, see documentation about performance
monitoring in the DS8000 Storage Management GUI.
Sign-on support that uses Lightweight Directory Access Protocol (LDAP)
The DS8000 system provides support for both unified sign-on functions
(available through the DS8000 Storage Management GUI), and the ability
to specify an existing Lightweight Directory Access Protocol (LDAP) server.
The LDAP server can have existing users and user groups that can be used
for authentication on the DS8000 system.
Setting up unified sign-on support for the DS8000 system is achieved by
using IBM Copy Services Manager or IBM Spectrum Control. .
Note: Other supported user directory servers include IBM Directory Server
and Microsoft Active Directory.
Easy Tier
Easy Tier is designed to determine the appropriate tier of storage based on
data access requirements and then automatically and nondisruptively move
data, at the subvolume or sub-LUN level, to the appropriate tier on the
DS8000 system. Easy Tier is an optional feature that offers enhanced
capabilities through features such as auto-rebalancing, hot spot
management, rank depopulation, and manual volume migration.
Easy Tier enables the DS8880 system to automatically balance I/O access to
drives to avoid hot spots on arrays. Easy Tier can place data in the storage
tier that best suits the access frequency of the data. Highly accessed data
can be moved nondisruptively to a higher tier, and likewise cooler data is
moved to a lower tier (for example, to Nearline drives).
Easy Tier also can benefit homogeneous drive pools because it can move
data away from over-utilized arrays to under-utilized arrays to eliminate
hot spots and peaks in drive response times.
z-synergy
The DS8880 storage system can work in cooperation with IBM Z hosts to
provide the following performance enhancement functions.
v Extended Address Volumes
v High Performance FICON for IBM Z
v I/O Priority Manager with z/OS Workload Manager
v Parallel Access Volumes and HyperPAV (also referred to as aliases)
v Quick initialization for IBM Z
v Transparent cloud tiering
v ZHyperLink technology that speeds up transaction processing and
improves active log throughput
Copy Services
The DS8880 storage system supports a wide variety of Copy Service
Chapter 1. Overview 25
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