Functions - IBM DS8900F Introduction And Planning Manual

z-synergy
The DS8900F storage system can work in cooperation with IBM Z hosts to provide the following
performance enhancement functions.
• Extended Address Volumes
• High Performance FICON for IBM Z
• Parallel Access Volumes and HyperPAV (also referred to as aliases)
• Quick initialization for IBM Z
• Transparent cloud tiering
• ZHyperLink technology that speeds up transaction processing and improves active log throughput
• IBM Fibre Channel Endpoint Security
zHyperLink read and write function
zHyperLink is a short distance, mainframe-attached link that provides up to 10 times lower latency
than high-performance FICON. zHyperLink speeds Db2 for z/OS transaction processing and improves
active log throughput. zHyperLink technology delivers low latency when traditional SAN-attached
storage systems are used with its complementary short-distance link technology.
Low latencies are provided for read and write operations for storage systems within the 150-meter
distance requirement by using a point-to-point link from the z14 to the storage system I/O bay. Low
I/O latencies deliver value through improved workload-elapsed times and faster transactional
response times, and contribute to lower scaling costs. This storage system implementation of
zHyperLink I/O delivers service times fast enough to enable a synchronous I/O model in high-
performance IBM Z servers.
Copy Services
The DS8900F storage system supports a wide variety of Copy Service functions, including Remote
Mirror, Remote Copy, and Point-in-Time functions. The following includes key Copy Service functions:
• FlashCopy
• Remote Pair FlashCopy (Preserve Mirror)
• Safeguarded Copy
• Remote Mirror and Copy:
– Metro Mirror
– Global Copy
– Global Mirror
– Metro/Global Mirror
– Multi-Target PPRC
– z/OS Global Mirror
– z/OS Metro/Global Mirror
Multitenancy support (resource groups)
Resource groups provide additional policy-based limitations. Resource groups, together with the
inherent volume addressing limitations, support secure partitioning of Copy Services resources
between user-defined partitions. The process of specifying the appropriate limitations is performed
by an administrator using resource groups functions. DS CLI support is available for resource groups

functions.

Multitenancy can be supported in certain environments without the use of resource groups, if the
following constraints are met:
• Either Copy Services functions are disabled on all DS8000 systems that share the same SAN (local
and remote sites) or the landlord configures the operating system environment on all hosts (or host
LPARs) attached to a SAN, which has one or more DS8000 systems, so that no tenant can issue
Copy Services commands.
Chapter 1. Overview 11