Which is the best choice, pae or x64?

[Liam Proven]

On 26 September 2010 03:59, Rofail Qu <rofail at gmail.com> wrote:
> Very detailed description. Thanks a lot.
> I think 64-bit ubuntu is my best choice for almost all softwares installed
> on this computer are open source, and its major use is science computing.

I agree.

> Yes. I really ever confused x86-64 with VT or AMD-V.

:¬)

> Once, I ever help one install a 64-bit Windows7 in VMWare under Windows XP.
> I found that her pc's bios has VT options. And could install the
> 64-bit Windows7 VM only if i enable it. From then on, I thought I must
> enable the VT options when i want to install a 64-bit OS on a EMT64
> cpu(not only as VM).

No, there's no need. But if you have the option of VT, you might as
well leave it on permanently.

> So, I don't need Intel VT enabled to run an *64-bit* VM under 64-bit
> ubuntu (not like case of run 64-bit Windows7 under 32-bit Windows XP),
> is that right?

Depends on the hypervisor you choose. I believe VirtualBox does not
/need/ it but will use it if it is there.

> Two more question, If I enable VT option, can VirtualBox automatically
> benefit from it when i run a 64-bit VM under 64-bit ubuntu?

It is an option; you can turn if off. I don't know for sure if it is
on by default, as I do not have VT on any of my machines to try it
out.

> Is 64-bit virtualbox in ubuntu's source good enough?

I recommend the full edition, not the limited "Open Source Edition"
(VirtualBox OSE). It is a free download from here:
http://www.virtualbox.org/

It's very easy to install. It will not update automatically, but every
time you run it, it checks to see if there's a newer version & tells
you if there is.

> I am now using VMWare Workstation under ubuntu, but performance is poorly.

I have not tried VMware Workstation in many years, as it is a paid-for
piece of software & I prefer to use free tools. Some people prefer it.
I am perfectly happy with VirtualBox myself.

I have played with VMware Player and VMware Server. Both are pretty good tools.

--
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