[QUOTE=stelgenkamp;23264]Moved the database server off to the Xen to a bare metal server.
Still no improvement :[/QUOTE]
That seems to eliminate Xen as the source of the problem.
[QUOTE]ALL other WS ( Windows XP 32 bits ) remain around 5 Mbit/s
And it makes no difference if the WS is virtual or not.[/QUOTE]
Still, I would expect better performance when running on bare metal! How are you measuring this throughput?
[QUOTE]Testing with 1 of the slow workstations, on the cable of the W7 ws shows do difference.
So this rules out cabling.[/QUOTE]
When the system performance suffers it could be do to one or more components in the system. The only way to eliminate the bottleneck is to do careful testing in a way that eliminates each of the components one at a time. Remember also that what a small business considers reasonable performance may be completely unacceptable for a large enterprise.
[QUOTE]Any ideas are welcome.
If you would like our help, we need to first know more about your configuration. Jens (jmozden) asked for additional information which you have not yet provided. I too have some questions. Performing random tests then posting the results does not help if we don’t know how these tests were conducted. It would also help if we could identify specific components to make it easier to refer to them. Can you provide device names or IP addresses to uniquely identify the devices we are testing?
First, tell us about the physical network:
Approximately how many physical Windows 7 PCs do you have?
Are they all “fast” or are some of them slow?
Approximately how many physical Windows XP PCs do you have?
Are they all “slow” or are some of them fast?
Are all these devices connect to the same switch?
What make/model is your switch?
[*]Are all devices on the same subnet?
Now, the bottleneck could be anywhere: workstation, server, network…
Can you copy a large file from one “fast” Windows 7 physical workstation to a second “fast” Windows 7 physical workstation and report back what throughput you have and how you are measuring it?
Can you next copy a large file from one “fast” Windows 7 physical workstation to a second “slow” Windows XP physical workstation and report back what throughput you have and how you are measuring it?
These two tests will do a couple of things:
It will establish what is the maximum throughput we can expect from your “fast” workstations.
It will eliminate Xen, VMs, Servers, and databases.
[*]If the throughput is reasonable, it will confirm that the network and the workstations are unlikely the bottleneck.
After you provide the requested information, we can decide what the next steps might be.