hiper-threading?

hi
vendors offers to me
hiper-threading technology
what type of server would be improve
its performance with that technology?
data servers (i say, sql) ?
web server?

thanks

atte
Hernán Castelo
SGA - UTN - FRBA

Any server running cpu-intensive applications such as SQL or Exchange would
likely benefit to some extent.

--
- Axel Larson
"Hernán Castelo" <(E-Mail Removed)> wrote in message
news:#(E-Mail Removed)...
> hi
> vendors offers to me
> hiper-threading technology
> what type of server would be improve
> its performance with that technology?
> data servers (i say, sql) ?
> web server?
>
> thanks
>
> atte
> Hernán Castelo
> SGA - UTN - FRBA
>
>

Hernán Castelo wrote:
> hi
> vendors offers to me
> hiper-threading technology
> what type of server would be improve
> its performance with that technology?
> data servers (i say, sql) ?
> web server?

I'd have to agree with Axel, typically processor intensive things like SQL
and Exchange can benefit from it.

However, the OS has to be hyperthreading aware in order to schedule stuff
for the "virtual" processor properly (In windows server terms this means
Windows 2003 at the moment). If your OS doesn't realise that some of the
processors it sees are only "virtual" ones then it can overload them with
work that doesn't work well at sharing the processor core in the way you
need to get decent performance from hyperthreading.

I'd say that a hyper threading processor isn't a substitute for a dual
processor machine if you actually need proper dual processing power, but can
provide an interesting performance "boost" in places where you've sized the
system based on the number of real processors.

--
--
Rob Moir, Microsoft MVP for servers & security
Website - http://www.robertmoir.co.uk
Virtual PC 2004 FAQ - http://www.robertmoir.co.uk/win/VirtualPC2004FAQ.html

Kazaa - Software update services for your Viruses and Spyware.

Hi Robert,
Have you seen any hard numbers on hyperthreading performance vs. dual
processors?

--
- Axel Larson

"Robert Moir" <(E-Mail Removed)> wrote in message
news:uNZ0$(E-Mail Removed)...
> Hernán Castelo wrote:
> > hi
> > vendors offers to me
> > hiper-threading technology
> > what type of server would be improve
> > its performance with that technology?
> > data servers (i say, sql) ?
> > web server?
>
> I'd have to agree with Axel, typically processor intensive things like SQL
> and Exchange can benefit from it.
>
> However, the OS has to be hyperthreading aware in order to schedule stuff
> for the "virtual" processor properly (In windows server terms this means
> Windows 2003 at the moment). If your OS doesn't realise that some of the
> processors it sees are only "virtual" ones then it can overload them with
> work that doesn't work well at sharing the processor core in the way you
> need to get decent performance from hyperthreading.
>
> I'd say that a hyper threading processor isn't a substitute for a dual
> processor machine if you actually need proper dual processing power, but
can
> provide an interesting performance "boost" in places where you've sized
the
> system based on the number of real processors.
>
> --
> --
> Rob Moir, Microsoft MVP for servers & security
> Website - http://www.robertmoir.co.uk
> Virtual PC 2004 FAQ -
http://www.robertmoir.co.uk/win/VirtualPC2004FAQ.html
>
> Kazaa - Software update services for your Viruses and Spyware.
>
>

Axel Larson wrote:
> Hi Robert,
> Have you seen any hard numbers on hyperthreading performance vs. dual
> processors?

A lot of speculation, nothing firm.

I think toms hardware has something on it, and Raymond Chen's weblog
mentions a bit about the issue with real vs. virtual processors that i
talked about...

http://weblogs.asp.net/oldnewthing/a...13/228780.aspx


Rob

http://developer.intel.com/business/...demo/index.htm

It's useful to note that hyper-threading is supported by Intel Pentium 4 and
Intel Xeon processors. Intel offers hyper-threading boards which support
from one to four processors.