TEST REPORT

Initial investment payback analysis: DellMAY 2009 PowerEdge R710 solution with VMware ESX vs. HP ProLiant DL385 solution

Executive summary

Dell Inc. (Dell) commissioned Principled Technologies (PT) to estimate how many months it would take to recapture initial investment costs when consolidating multiple 4-year- old HP ProLiant DL385 server and storage solutions onto a Dell™ PowerEdge™ R710 server and storage solution using VMware ESX. In this report, we estimate both the number of older solutions each Dell PowerEdge R710 solution can replace and the payback period for replacing those older solutions. We compare the following two solutions:

Intel® Xeon® Processor X5550-based Dell PowerEdge R710 server with 96 GB of memory using VMware ESX and Dell™ EqualLogic™ PS6000XV storage (Dell PowerEdge R710 solution)

AMD Opteron 254-based HP ProLiant DL385 G1 server with 4 GB of memory and HP StorageWorks MSA30 storage (HP ProLiant DL385 solution)

KEY FINDINGS

zEach Dell PowerEdge R710 solution with VMware® ESX™ can replace seven HP ProLiant DL385 solutions, and could yield a payback in under 18 months. (See Figure 1.)

zThe Dell PowerEdge R710 solution with VMware ESX delivered seven virtual servers, each of which yielded performance equivalent to or better than the performance of one physical HP ProLiant DL385 solution. (See Figure 4.)

zThe Dell PowerEdge R710 solution with VMware ESX used little more than 1/5th of the power, about 4/5 of the software costs, and 1/7th of the data center rack space of the seven HP ProLiant DL385 solutions. (See Figures 3 and 7.)

Figure 1: A single Intel Xeon Processor X5550-based Dell PowerEdge R710 solution with VMware ESX allows you to consolidate seven AMD Opteron 254-based HP ProLiant DL385 solutions, with an initial investment payback period of under 18 months. We base this estimation on our specific database workload.

Our test case modeled a typical enterprise datacenter with multiple legacy HP ProLiant DL385 solutions running high-demand database workloads. The legacy servers each used 4 GB of memory. The enterprise in this test case seeks to consolidate several of these legacy workloads onto Dell PowerEdge R710 solutions using VMware ESX and configured with sufficient processors, memory, and storage to handle these workloads.

We used benchmark results from the Dell DVD Store Version 2.0 (DS2) performance benchmark to determine the number of older servers with accompanying storage that a Dell PowerEdge R710 solution could replace. To define the replacement factor, we measured the number of orders per minute (OPM) that the HP ProLiant DL385 solution could perform when running a demanding DS2 workload. We then ran DS2 in virtual machines (VMs) on the Dell PowerEdge R710 solution and measured how many VMs this newer solution could run, while obtaining