On Fri, Oct 15, 2010 at 22:42, Aage Johansen <aagjohan@...> wrote:

>
> Markus Ostenried wrote:
> <<
> On Thu, Oct 14, 2010 at 11:39, Nick Upson <nick.upson@...> wrote:
>  > I will shortly be setting up firebird CS 2.1 on a virtual machine for
>  > the first time, I've always used 'real' machines up to this point
>  >
>  > any tips or things to watch out for?
>
> Not that I know of. I've installed Firebird on more virtual than
> physical machines, using Debian or Windows as OS and it works fine for
> me.
>  >>
>
> Have you noticed any change in I/O speed with virtual machines
> (compared to 'real' machines)?
> We moved some databases to a VM and observed some decrease in I/O
> performance, but since both machine and disks are different I'm not
> sure where the "problem" is.  IIRC, this was gbak performance (Fb/2.1).

Sorry, I don't have numbers for performance measurement. Or
applications don't need much resources most of the time. But it
"feels" like I/O is a bit slower in the vm, noticed when copying large
files within the same vm or - as you said - when doing a backup or
restore. Though since we switched from vmware server to vmware esxi
(both free) we can run more virtual machines on the same hardware.