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P e r f o r m a n c e W h i t e P a p e r
2
R2200 base conguration
• VI-3 (ESX) as virtualization hypervisor
• Dual 3.2 GHz Intel Xeon CPUs
• NFS server on an R1300 with Suse Linux
v10 – serving as a NAS
• VMs; each VM O.S. image is stored on the
NAS
2. Interpreting the Performance Results
The performance summaries shown in Tables 1 and
2 communicate the recommended maximum number
of VMs that can be used to obtain reasonable per-
formance. In this performance study, we evaluated
three primary performance areas:
• CPU utilization
• Memory utilization
• I/O utilization
Typically, these three components are the main
stress points in computing environments. During this
study, however, the I/O utilization did not seem to be
a factor in any of the congurations. (We will discuss
this further in the R2200 conguration, which used
a unique conguration for Internet Protocol-based
storage.)
Now, we’ll look more closely at the behavior of each
main conguration starting with the A1010.
a. A1010 + VMware Virtual Server (GSX) Congu-
ration
Consider an A1010 blade with 3 GB of RAM. This
conguration can support ve VMs. Since VMware
Server 1.0.1 does not have a sophisticated memo-
ry-handling routine, it is not possible to add a sixth
VM to the 3 GB RAM conguration and still achieve
reasonable performance. In this case the memory
utilization is:
Maximum Virtual Machines
GB RAM Good Performance Maximum Load
4 7 8
6 12 14
8 15 17
Table 2. Performance Results for R2200 + ESX
GB RAM/VM Total GB Purpose
0.5 0.5 Required by the host OS and the VMware Server kernel
0.5 2.5 Required for 5 x 512MB RAM used by each VM
3.0 Total Memory Required
Table 3. Memory Requirement for A1010 Virtual Machines
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