542 IBM z13s Technical Guide
I.1 GDPS overview
GDPS is a collection of offerings, each addressing a different set of IT resiliency goals that
can be tailored to meet the recovery point objective (RPO) and recovery time objective (RTO)
for your business. Each offering uses a combination of server and storage hardware or
software-based replication, automation, and clustering software technologies. In addition to
the infrastructure that makes up a GDPS solution, IBM also includes services, particularly for
the first installation of GDPS and optionally for subsequent installations, to ensure that the
solution meets your business objectives.
Figure I-1 illustrates some of the GDPS offerings.
Figure I-1 GDPS offerings
For a complete description of GDPS solution and terminology, see IBM GDPS Family of
Products: An Introduction to Concepts and Capabilities, SG24-6374.
It is typical to deploy IT environments that are only running Linux on z Systems. The GDPS
Virtual Appliance is a building block of high availability (HA) and disaster recovery (DR)
solutions for those environments that do not have or require z/OS skills.
The following are the major drivers behind implementing an HA/DR architecture:
Regulatory compliance for business continuity (99.999% or higher availability)
Avoid financial loss
Maintaining reputation (which also translates into customer satisfaction, and thus money)
Definitions:
RPO defines the
amount of data that you can afford to re-create during a recovery, by
determining the most recent point in time for data recovery.
RTO is the
time that is needed to recover from a disaster or how long the business can
survive without the systems.
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