[PVE-User] Performance comparison

Gilberto Nunes gilberto.nunes32 at gmail.com
Sat Aug 24 14:22:44 CEST 2013

hum... thank you Michael... I'll check out...
I saw in a website or in a list, I really don't remember, that VMWare
don't reveal any benchmark and even deny data about this matter... Is
that true?
Is there some tool that we can use to perform a benchmark, with
graphics and others stuff??

Thanks again

2013/8/24 Michael Rasmussen <mir at miras.org>:
> On Sat, 24 Aug 2013 11:20:37 +0000
> Gilberto Nunes <gilberto.nunes32 at gmail.com> wrote:
>> sorry... what I found is just feature comparison.... and nothing about
>> performance...
>> if someone can help, I will appreciate...
> There is a master thesis from Oslo University College available here.
> Do remember though that the virtualization development is moving fast
> and this thesis compares ESXi 5.0 KVM 1.4 so much can have change
> since that. You could, however use the test on newer versions:
> "Abstract:
> The main purpose of this thesis is to compare the performance overhead
> of the virtualization infrastructures KVM and VMWare. All the
> experiments are carried out by using the Red Hat Enterprise Linux(RHEL)
> Operating System version 6.1. The study focuses on the performance of
> disk I/O operations, memory operations and CPU operations. The
> benchmarking tools used are Iozone for disk I/O, Ram Speed for memory
> and UnixBench for CPU. First a set of benchmarking tests are carried
> out by using a Bare Metal installation of RHEL 6.1 on a Dell Poweredge
> R710 server. Next the exact same set of benchmark tests are run after
> installing RHEL 6.1 on a single virtual machine running on KVM on the
> same server. Finally VMWare ESXi 5.0 is installed on the server and
> RHEL 6.1 is installed on a single virtual VMWare machine. In this way
> the performance overhead of the two virtualization infrastructures KVM
> and VMWare is measured and compared. Each benchmarking test is run in
> each of the three cases sufficiently many times to produce
> statistically significant results. The VMWare I/O disk performance is
> mostly from 20 to 30% better than KVM, with a few exceptions. And
> generally the VMWare I/O performance is 10-15% less than the Bare Metal
> performance. The memory performance overhead is relatively smaller. KVM
> performs better than VMWare for block sizes of 4MB and less, while the
> results show the opposite for block sizes larger than 4MB. When testing
> pure ALU usage, there is almost no virtualization overhead. There was
> some overhead for the other UnixBench CPU tests and in all these cases
> VMWare was performing better than KVM. Our general conclusion is that
> the virtualization overhead is less for VMWare than for KVM."
> https://www.duo.uio.no/handle/10852/34900
> --
> Hilsen/Regards
> Michael Rasmussen
> Get my public GnuPG keys:
> michael <at> rasmussen <dot> cc
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> mir <at> datanom <dot> net
> http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C
> mir <at> miras <dot> org
> http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917
> --------------------------------------------------------------
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Gilberto Nunes

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