IBM z/OS - Manual (Page 57)

57
• Software pricing models designed to support on
demand reality
z/OS 1.6 is the fi rst release of z/OS that requires the
z/Architecture. This release will only run on zSeries servers
(z890, z990, z800, z990) or equivalent servers.
z/OS.e
z/OS.e is unique for the z800 and z890 providing select
function at an exceptional price. z/OS.e is intended to help
customers exploit the fast growing world of on demand
business by making the deployment of new applications
on the z800 and z890 very attractively priced.
z/OS.e uses the same code base as z/OS with custom
parameters and invokes an operating environment that is
comparable to z/OS in service, management, reporting,
and reliability. In addition, z/OS.e invokes zSeries hard-
ware functionality just as z/OS does. No new z/OS skills
and service procedures are required for z/OS.e.
For more information on z/OS.e see the IBM ^
zSeries 890 and z/OS Reference Guide.
Intelligent Resource Director
Intelligent Resource Director (IRD) is a key feature of the
z/Architecture which extends the Workload Manager
to work with PR/SM on zSeries servers to dynamically
manage resources across an LPAR cluster. An LPAR
cluster is the subset of the z/OS systems that are running
as LPARs on the same CEC in the same Parallel Sysplex.
Based on business goals, WLM can adjust processor
capacity, channel paths, and I/O requests across LPARs
without human intervention.
IRD assigns resources to the application; the applica-
tion is not assigned to the resource. This capability of a
system to dynamically direct resources to respond to the
needs of individual components within the system is an
evolutionary step. It enables the system to continuously
allocate resources for different applications, and this helps
to reduce the total cost of ownership of the system. IRD is
made up of three parts that work together to help optimize
the utilization of zSeries resources:
• LPAR CPU Management
• Dynamic Channel Path Management
• Channel Subsystem Priority Queuing
The z/OS Intelligent Resource Director (IRD) Planning
Wizard helps to plan your IRD implementation by asking
questions about your enterprise setup, and produces a
worksheet that describes the issues on each of your sys-
tems that you must consider before you can implement
IRD. The z/OS IRD Planning Wizard supports z/OS 1.2 and
higher.
zSeries Application Assist Processor
The IBM ^ zSeries Application Assist Processor
(zAAP), available on the z990 and z890 servers, is an
attractively priced specialized processing unit that pro-
vides an economical Java execution environment for z/OS
for customers who desire the traditional qualities of service
and the integration advantages of the zSeries platform.
When confi gured with general purpose processors within
logical partitions running z/OS, zAAPs may help increase
general purpose processor productivity and may contrib-
ute to lowering the overall cost of computing for z/OS Java
technology-based applications. zAAPs are designed to
operate asynchronously with the general processors to
execute Java programming under control of the IBM Java
Virtual Machine (JVM). This can help reduce the demands
and capacity requirements on general purpose proces-
sors, which may then be available for reallocation to other
zSeries workloads.