Was simple performance stats between Xen 2.0 and 3.0 (was Re: [Xen-users] Xen, NFS performance, rsize, wsize and MTU)

["Nicholas Lee" <emptysands@xxxxxxxxx>]

On 23/02/06, Chris Fanning <christopher.fanning@xxxxxxxxx> wrote:

I was trying to set up home accounts on a domU.
I've tested what you said about homes on domU and guess what, you're right :)

I'm going to set them up on dom0 (or somewhere else).

I've got two machines in a colo now with Xen. Now I've sort out my bridging problem I can do a bit of simple testing. Its a reasonable difference.

From x335 domU (running 2.0) to v20z (running 3.0):

[nic@shell:~] scp Atiz_1606_CNNH.mpg wuwei:   # host0 on v20z
Atiz_1606_CNNH.mpg                                                                                        100%   42MB  10.5MB/s   00:04
[nic@shell:~] scp Atiz_1606_CNNH.mpg svn: #domU on v20z
Atiz_1606_CNNH.mpg                                                                                        100%   42MB   4.7MB/s   00:09

[nic@shell:~] scp Atiz_1606_CNNH.mpg stateless: # host0 on x335
Atiz_1606_CNNH.mpg                                                                                        100%   42MB  14.0MB/s   00:03
[nic@shell:~] scp Atiz_1606_CNNH.mpg flavour: # domU on x335
Atiz_1606_CNNH.mpg                                                                                        100%   42MB   1.5MB/s   00:28

However, looks like 3.0 to 3.0 is much better.

nic@svn:~$ scp Atiz_1606_CNNH.mpg wuwei: # host0  from domU on v20z
Atiz_1606_CNNH.mpg                                                                                        100%   42MB  42.0MB/s   00:01
nic@svn:~$ scp Atiz_1606_CNNH.mpg rails: # domU from domU on v20z
Atiz_1606_CNNH.mpg                                                                                        100%   42MB  14.0MB/s   00:03

Still there is a large difference between dom0 to domU and domU to domU and obviously a domU in Xen 2.0 is not able to handle supplying other domUs on the same host0 effectively.

-- 
Nicholas Lee
http://stateless.geek.nz
gpg 8072 4F86 EDCD 4FC1 18EF  5BDD 07B0 9597 6D58 D70C
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