What OS are you using as a host? I tried a performance test on beta1 using the following guests ubuntu, vista, server 2003. I used sysoft sandra to performance test various guests on each host, however the performance figures were not very consistant between tests, so I wasn't able to draw too many conclusions. One thing I did notice is that the network performance was much slower when using ubuntu as a host compared to the 2 windows OS's.
Host is Oracle Enterprise Linux 5.1 with a PAE kernel. Guest is based on CentOS, either 5.0 or 5.1, can't tell exactly.
Another note is that the host is running a software RAID5 across 3 physical 10k SCSI drives. Host disc access doesn't seem too bad, but from the guest it's absolutely abysmal.
I've been having some odd network problems as well. I'm using Ubuntu 8.04 LTS Beta as my host, my guest is Windows Server 2008. I seem to lose the network every few hours and it requires a reboot. I'm investigating further what's really going on. Any help or thoughts would be greatly appreciated.
I'm using two bridged interfaces on a CentOS VM (one private and one public) and whereas the private interface works fine, I sometimes get no connectivity at all through the public interface. I have tried an Ubuntu guest, and have found no issues at all with networking. I'm running on a Windows Server 2008 host, so I'm guessing the problem lies in CentOS
I found that there were a few issues with only the BRIDGED adapters,
including that in W2k8 the os would forget the gateway address (bad) and
then also the adapter would stop sending any packets after some time. No
idea why yet, but I am looking into it.