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xen-devel
RE: [Xen-devel] Follow-up
> -----Original Message-----
> From: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Tom Cranbrook
> Sent: 27 September 2004 23:39
> To: Mark A. Williamson; xen-devel@xxxxxxxxxxxxxxxxxxxxx;
> tcranbrook@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Follow-up
>
> >
> >Performance with VNC was OK when we tried it (like Ian said). In
fact we
> >turned off compression in order to minimise the overheads, given
> interdomain
> >networking should be wicked-fast.
> >
> >I haven't tried NX on Xen (waiting for a feature-complete FreeNX to
> become
>
> >readily available), although I very impressed by it's performance
when I
> >tried it internationally via the internet. It'd be interesting to
see
> how
>
> >well it performs between domains, particularly in comparison to other
> systems
> >like VNC. In any case, it still has the advantages of remote
printing +
> >sound + file sharing.
> >
> >Cheers,
> >Mark
> >
>
> Well, so far NX performs like shit, but I suspect something else may
be
> the
> problem. I notice on the dom1 run that top reports no swap file at
all.
> If this is true, I would expect bad performance. Does a vm see the
swap
> partitions? How are they defined to a vm?
>
You can give access to any other partition using the config file in the
same way you give access to the root partition. You can't share the same
swap partition amongst different VMs so you have to create one for each
VM. You'd also need to adjust /etc/fstab to whatever partition you
decide to map the physical swap partition.
However, I wouldn't expect performance to be "shit" because of no swap
file. If you'd run out of physical memory (ie need swap) Linux would
complain and not just run slower...so the problem is probably be
elsewhere.
As Ian said, we don't really have experience with NX but have used vnc
with reasonable performance.
Rolf
>
>
>
>
>
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