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8/6/2019 (Redhat) Linux Important Stuff (58)
http://slidepdf.com/reader/full/redhat-linux-important-stuff-58 1/2
RED HAT ENTERPRISE VIRTUALIZATION:SCALING SAP
EXECUTIVE SUMMARY
The goal
To demonstrate that SAP workloads can be effectively
virtualized using Red Hat Enterprise Virtualization, allowing
organizations to take advantage of the benefits of
virtualization without compromising on performance andscalability.
Why should I care?
SAP is the world's leading provider of business software,
with over 85,000 customers depending on SAP solutions to
manage their business operations.
What was tested?
What was the result?
Red Hat Enterprise Virtualization scaled well, with low
overhead costs of virtualizing multiple hosts and multiple
virtual CPUs. Red Hat Enterprise Virtualization exhibited
up to 95% of bare metal performance with SAP. SAP is
designed to make use of memory and multiple CPUs, and
therefore any loss of performance due to consolidation
reflects both the efficiency of the hypervisor platform as
well as the efficiency of the SAP code. In Red Hat's testing,
performance nearly comparable to bare metal (up to 95%)
can be achieved by scaling the number of guests and
vCPUs.
SAP SCALES UP LINEARLY FROM 1-4 X 2 VCPUGUESTS. VIRTUALIZATION EFFICIENCY UP TO 95% OFBARE METAL PERFORMANCE.
The performance of SAP Server was measured on the Red
Hat Enterprise Virtualization hypervisor running on an Intel
server with 16 logical CPUs. Red Hat Enterprise
Virtualization exhibited excellent scaling and performance
across multiple configurations.
Scale-up of a single VM with 2, 4, or 8 vCPUs yields up to
100% of expected maximum performance. Scaling up
multiple VMs with multiple vCPUs on a single host also
exhibits minimal loss of performance due to virtualization
overhead.
Scale-out of multiple virtual guests on a single host
demonstrated up to 95% of bare metal performance using 8
x 2 vCPU guests or 4 x 4 vCPU guests and 86% of bare
metal with 2 x 8vCPU guests.
8/6/2019 (Redhat) Linux Important Stuff (58)
http://slidepdf.com/reader/full/redhat-linux-important-stuff-58 2/2
WHAT WAS THE GOAL?
Red Hat tested the performance of the SAP LinuxLab
Certification Suite (SLCS) on Red Hat Enterprise Linux
guests running on Red Hat Enterprise Virtualization. The
results of Red Hat's SAP testing are scalability and
performance measurements that support the production-
readiness of Red Hat Enterprise Virtualization for hosting
multiple virtualized SAP workloads.
WHAT WAS TESTED?
Testing was performed on an Intel server with two Intel Xeon
X5570 processors. These are 2.93 GHz quad-core
processors that support Hyper-Threading Technology, so
there are 8 physical cores, but 16 logical CPUs through
hyperthreading. The host system has 48 GB of memory.
Storage was hosted on fibre channel storage arrays.
Scaling Up the VMs
First, the performance of SLCS was measured by loading a
single VM on the server, and assigning it 2, 4, or 8 vCPUs in
the VM. As shown in the graph “Scaling vCPUs and Memory
of a Single Guest” above, the performance scales linearly
from 2 to 4 vCPUs, and then shows better than linear scaling
from 4 to 8 vCPUs.
Scaling Out the VMs
A second series of tests involved scaling out multiple VMs of
2 or 4 vCPUs to total the 16 logical CPUs available in the
server. The performance of the application shows good
scalability and linearity. For example, the scaling of multiple
2 vCPU guests is nearly linear up to 4 guests (see below).
Beyond four guests, scalability is slightly lower with
increased reliance on hyperthreading.
Near-Bare Metal Performance
SAP has been engineered to be highly scalable, and thus
lends itself well to consolidation. Any loss of performance
due to consolidation therefore reflects both the efficiency of
the hypervisor platform as well as the efficiency of the SAP
code. In Red Hat's testing, performance nearly comparable
to bare metal (up to 95%) can be achieved by scaling the
number of guests, with the best performance at 8 x 2 vCPUand 4 x 4 vCPU guest levels. See the graph “Virtualization
Efficiency: Consolidation” on the front page.
WHAT NEXT?
For more information, please go to http://www.redhat.com/
rhev/server or contact your local Red Hat Enterprise
Virtualization reseller.
Copyright © 2009 Red Hat, Inc. “Red Hat,” Red Hat Linux, the Red Hat “Shadowman” logo, and the products listed aretrademarks of Red Hat, Inc., registered in the U.S. and other countries. Linux® is the registered trademark of Linus Torvaldsin the U.S. and other countries. All other names and marks may be trademarks of their respective companies.
RHEVS026R3-20091030 October 30, 2009
www.redhat.com