Re: performance differences between kvm/xen

[Tom Bishop <bishoptf@xxxxxxxxx>]

Ok so I'd like to help, since most folks have Intel Chipsets, I have a AMD 4p(16 core)/32gig memory opteron server that I'm running that we can get some numbers on....but it would be nice if we could run apples to apples...I have iozone loaded and can run that but would be nice to run using the same parameters....is there any way we could list the types of test we would like to run and the actual command with options listed and then we would have some thing to compare at least  level the playing field...KB, any thoughts, is this a good idea?

On Wed, Oct 20, 2010 at 6:52 AM, Karanbir Singh <mail-lists@xxxxxxxxx> wrote:

On 10/20/2010 12:35 PM, Dennis Jacobfeuerborn wrote:
> Being skeptical is the best approach in the absence of
> verifiable/falsifiable data. Today or tomorrow I'll get my hands on a new
> host system and although it is supposed to go into production immediately I
> will probably find some time to do some rudimentary benchmarking in that
> regard to see if this is worth investigating further. Right now I'm

That sounds great. I've got a machine coming online in the next few days
as well and will do some testing on there. Its got 2 of these :

Intel(R) Xeon(R) CPU E5310

So not the newest/greatest, but should be fairly representative.

> planning to use fio for block device measurements but don't know any decent
> (and uncomplicated) network i/o benchmarking tools. Any ideas what tools I
> could use to quickly get some useful data on this from the machine?

iozone and openssl speed tests are always a good thing to run as a 'warm
up' to your app level testing. Since pgtest has been posted here
already, I'd say that is definitely one thing to include so it creates a
level of common-code-testing and comparison. mysql-bench is worth
hitting as well. I have a personal interest in web app delivery, so a
apache-bench hosted from an external machine hitting domU's / VM's ( but
more than 1 instance, and hitting more than 1 VM / domU at the same time
) would be good to have as well.

And yes, publish lots of machine details and also details on the code /
platform / versions used. I will try to do the same ( but will  limit my
testing to whats already available in the distro )

thanks

- KB

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