IBM Systems Magazine, Mainframe Edition - March/April 2013 - 34

Tech Corner

Workload Management Results
CPU usage, throughput and responsetime metrics were measured for the
variable profile workload. As illustrated
in Figure 2 (right), System z priority
workload performance numbers in a
shared environment are almost identical
to those of a stand-alone environment.
For the common Intel hypervisor,
priority workload performance
numbers in a shared environment are
significantly poorer than those in the
stand-alone environment, as indicated in
Figure 3 (right).
Stress Profile Results
Similarly, CPU usage, throughput and
response-time metrics were measured
for the stress profile workload, as
indicated in Figure 4 (page 36). Again,
z/VM priority workload performance
numbers in a shared environment were
almost identical to those of a stand-alone
environment. In the case of the common
Intel hypervisor platform, significant

22
34

MARCH/APRIL 2013

degradation was seen in throughput and
response-time metrics.

Economic Impact
Research demonstrates that the
common Intel hypervisor is unable
to maintain the SLA of the higherpriority workload. With such a
platform, the only practical solution to
maintain SLAs is to deploy the various
workloads into separate environments.

The need to maintain multiple
environments directly affects the total
cost of the solution. In a case study
comparing the three-year total cost of
acquisition (TCA) of a System z solution
versus that of an Intel hypervisorbased solution, IBM examined the
environments needed to deliver a fixed
workload size. The size consists of 11.89
million transactions of a high-priority
workload being delivered in an hour

Figure 2: z/VM—Variable Profile Test Results
Run High-Priority and Low-Priority Workloads Together—System z

% CPU Usage

Low priority
High priority

NO
throughput decrease
NO
response-time
increase

Time (mins)
High-Priority Workload Metrics
Total throughput: 9.125M
Avg. response time: 140ms

Figure 3: Common Intel Hypervisor—Variable Profile Test Results
Run High-Priority and Low-Priority Workloads Together—Intel Hypervisor
Low priority
High priority
% CPU Usage

environments, which are shown in
Figure 1 (page 33). The number
of priority guests was also sized to
saturate one of the priority-only
environments. This same load was
then used across all tested hypervisor
environments.
Each hypervisor offered some
means to favor guest resource
allocation. The means differed by
hypervisor but the intent did not.
For instance, the common Intel*
hypervisor uses “shares” to favor
guests. PR/SM uses LPAR weights
for the same purpose. The majority
of the testing done in this research
used a 99 to 1 ratio. For the Intel
hypervisor, priority guests were
given 99 percent shares and donors 1
percent shares. For IBM System z*,
two LPARs were given weights of 99
and 01, respectively. Priority guests
were hosted in the 99-weighted LPAR;
donor guests in the 01-weighted
LPAR.

30.7%
throughput decrease
45.1%
response-time
increase
21.9%
wasted CPU
minutes
Time (mins)
High-Priority Workload Metrics
Total throughput: 4.48M
Avg. response time: 220ms

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IBM Systems Magazine, Mainframe Edition - March/April 2013

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe Edition - March/April 2013

Table of Contents
Editor's Desk: Virtual Argument Over Cloud
IBM Perspective: The Perfect IT Combination
Data Display: IBM Mainframe: A Leader in Energy Efficiency
Trends: Batch Modernization Redefines Application Development
IT Today: Running Highly Stacked Workloads on System z Can Greatly Reduce Cost Per Unit of Work
Cover Story: Breaking Through Complexity: IBM Entry Cloud Configuration for SAP Solutions bring simplicity and efficiency
Feature: Reach Cloud's Potential: Build your IT environment with IBM zEnterprise and SmartCloud
Tech Corner: System z Virtualization Environment Provides Far Lower TCA Than Its Intel Alternative
Solutions: CA Database Management Solutions for DB2 for z/OS, and CA Mainframe Chorus; Attachmate Reflection 2011 R3; PerfTechPro for z/OS; Compuware APM for Mainframe
Advertisers Index
Stop Run
Reference Point - Global Events, Education, Resources for Mainframe
Special Report: Mobile Mainframe
2013 Mainframe Buyer's Guide Index
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Intro
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Cover1
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Cover2
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 1
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Table of Contents
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 3
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 4
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 5
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Editor's Desk: Virtual Argument Over Cloud
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 7
IBM Systems Magazine, Mainframe Edition - March/April 2013 - IBM Perspective: The Perfect IT Combination
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 9
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Data Display: IBM Mainframe: A Leader in Energy Efficiency
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 11
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Trends: Batch Modernization Redefines Application Development
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 13
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 14
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 15
IBM Systems Magazine, Mainframe Edition - March/April 2013 - IT Today: Running Highly Stacked Workloads on System z Can Greatly Reduce Cost Per Unit of Work
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 17
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 18
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 19
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Cover Story: Breaking Through Complexity: IBM Entry Cloud Configuration for SAP Solutions bring simplicity and efficiency
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 21
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 22
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 23
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 24
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 25
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Feature: Reach Cloud's Potential: Build your IT environment with IBM zEnterprise and SmartCloud
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 27
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 28
IBM Systems Magazine, Mainframe Edition - March/April 2013 - BB1
IBM Systems Magazine, Mainframe Edition - March/April 2013 - BB2
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 29
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 30
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 31
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Tech Corner: System z Virtualization Environment Provides Far Lower TCA Than Its Intel Alternative
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 33
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 34
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 35
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 36
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 37
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Solutions: CA Database Management Solutions for DB2 for z/OS, and CA Mainframe Chorus; Attachmate Reflection 2011 R3; PerfTechPro for z/OS; Compuware APM for Mainframe
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Advertisers Index
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Stop Run
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Cover3
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Cover4
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe Edition - March/April 2013 - RF2
IBM Systems Magazine, Mainframe Edition - March/April 2013 - Special Report: Mobile Mainframe
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS2
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS3
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS4
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS5
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS6
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS7
IBM Systems Magazine, Mainframe Edition - March/April 2013 - MS8
IBM Systems Magazine, Mainframe Edition - March/April 2013 - 2013 Mainframe Buyer's Guide Index
IBM Systems Magazine, Mainframe Edition - March/April 2013 - BG2
IBM Systems Magazine, Mainframe Edition - March/April 2013 - BG3
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