Dell FS7500 Technisches Handbuch - Seite 9

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3 Test topology and architecture

To study the performance impact of integrating a FS7500 into an existing EqualLogic SAN

environment, we needed to generate a workload of both block and file I/O. We chose to use the

open-source I/O workload generation tool Vdbench, which is available for download on

SourceForge.net. Vdbench requires a JAVA runtime environment, so we also installed the Sun (Oracle)

JRE version 6u24 on each client.

For clients, we configured four VMware® ESX 4.1 servers. Two of the servers were connected to the

back-end SAN switches (and to SAN storage), while the other two were connected to the front-end

LAN switches. On each ESX server, we created 8 Virtual Machines (VMs) that ran 64-bit Red Hat®

Enterprise Linux® (RHEL) version 5.6. Each VM had 512MB RAM and 4 virtual CPUs. This gave us 16

clients for block testing and 16 clients for file tests.

Figure 1: Test topology diagram

Our ESX servers consisted of two Dell PowerEdge R610 servers and two Dell PowerEdge R710 servers.

Each had 48GB of RAM and two quad-core processors. We used the onboard 1 Gigabit network ports

for management connectivity, and each server also had a pair of dual-port 10 Gigabit network cards.

Our LAN and SAN switches each consisted of a pair of Dell™ PowerConnect™ 6248 switches with

stacking modules. For our tests, these switches also contained a pair of 10 Gigabit uplink ports. We

connected the 10 Gigabit ports in the ESX servers to their respective switches through these uplink

BP1016

Integrating the Dell EqualLogic FS7500 into an Existing SAN