I don't know the answer to this, but as a side-note, there are big
differences between how Windows 2000 and Windows 2003 handle
HyperThreading: as a result, Windows 2000 boxes with HyperThreading
enabled (toggled in the BIOS usually) can suffer performance hits in
some circumstances.
It stems, so I understand, from the fact that Windows 2000 isn't able to
discriminate between a logical and a physical CPU. Say in a twin
physically processored box, it would see four different standalone CPUs.
When it comes to allocating threads between processors, it isn't able to
balance them between the physical processors, only logical ones - the
result can be that a single physical processor can get over loaded
whilst another physical processor is relatively scarcely loaded.
Windows 2003, on the other hand, is supposedly aware of HyperThreading,
and takes the physical processors into account when allocating jobs. I'm
not sure how much of an issue this might be with a standalone TSM
server, but I've heard of Oracle people moaning about this and turning
HyperThreading off. Definitely worth a little research...
Anyone any offers on the above? I'd be interested to learn of others'
experiences or thoughts, as we too have some Win2K hyperthreaded servers
(DL380 G3's) running TSM Server.
Rgds,
David McClelland
Management Systems Integrator
Global Management Systems
Reuters
85 Fleet Street
London EC4P 4AJ
E-mail david.mcclelland AT reuters DOT com
Reuters Messaging david.mcclelland.reuters.com AT reuters DOT net
-----Original Message-----
From: Brian L. Nick [mailto:BRIAN.NICK AT PHOENIXWM DOT COM]
Sent: 09 October 2003 12:50
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Hyper-threaded CPU's
Good morning,
Running a TSM 5.x server with the new licensing scheme how does TSM
report on hyper-threaded CPU's? We have several of them and are in the
process of moving to 5.2 and want to make sure that we are only counting
physical CPU's.
Anyone have any insight on this.
Thanks,
Brian
Brian L. Nick
Systems Technician - Storage Solutions
The Phoenix Companies Inc.
100 Bright Meadow Blvd
Enfield CT. 06082-1900
E-MAIL: Brian.Nick AT phoenixwm DOT com
PHONE: (860)403-2281
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