On Wednesday 21 February 2007 20:50, Martin McCormick wrote:
> If one has a FreeBSD system that has 1 gigabyte of RAM
> and a 1-GHZ processor, would it be possible to run a couple of
> vmware instances of FreeBSD? I want to set up a DHCP server on
> each virtual machine and configure one to be optimized for DHCP
> failover and dynamic leases while the other is dedicated to
> static bootp service. It would be much easier for the 2
> instances of dhcpd to run in separate machines, so to speak,
> since they normally use the same named files for logging and
> What sort of a performance hit does one usually see on a
> virtual machine?
Depends a lot on the virtual machine. VMware Server runs VM's pretty
efficiently, but there is a moderate hit. ESX server has almost n
> When we run dhcpd on a normal FreeBSD system of the type
> described above, the system is normally loaded around 0.05 or so
> so it isn't having to work too hard.
> Thanks for any help as to what vmware port is best. The
> platform is FreeBSD and the 2 virtual machines will also be
> FreeBSD if that makes any difference.
Modern versions of VMware don't run under FreeBSD. If you really want VMware
then install a supported Linux distro and run VMware server. (Or go out and
buy ESX or GSX server or one of the Workstation products). FreeBSD 6.2
works great as a guest under most VMware products.
> There will be no X windows involved, just hopefully 2
> DHCP servers running as if they were on two separate boxes.
> Any information to point me in the right direction or
> reasons why this is not a good idea are appreciated.
For what you're talking about, jails make a lot more sense than
virtualization or emulation. If you really want to run virtual machines
under FreeBSD, take a look at qemu. qemu (even with the kqemu_kmod port
(highly recommended) definitely has a noticeable performance impact, but
DHCP is so lightweight that it probably won't matter.
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