[ale] OT: Good customer-support experience with Tyan

[James P. Kinney III]

On Thu, 2006-02-16 at 09:44 -0500, Jeff Hubbs wrote:
> Explain to me how the RAM on this thing operates - some sort of 
> shared-and-per-CPU model?

The 4-slots closest to each processor are given affinity to that
processor. It's the standard way Opterons handle RAM. Since the CPU does
the controlling it gets pretty fast. CPU0 is the master controller for
all IO operational setup. 

Each processor can access all the RAM in the system. It can also reserve
a portion (or all) of the adjacent RAM for dedicated use.

Think ccNUMA-flex without the external bus.
> 
> Jeff
> 
> James P. Kinney III wrote:
> 
> >On Wed, 2006-02-15 at 23:22 -0700, Joe Knapka wrote:
> >  
> >
> >>James P. Kinney III wrote:
> >>
> >>    
> >>
> >>>BTW: Tyan makes a kick-butt 8-processor dual core Opteron mobo that
> >>>would be a guaranteed divorce if I tried to sneak it in. :( I was told I
> >>>can't even price it. :{  So I put up the best color print of it I could
> >>>find and wrote my birthday on it. I know it won't happen since each CPU
> >>>is $1800 and I want all 8 sockets stuffed (and the ram stuffed...)
> >>>http://www.tyan.com/products/html/thunderk8qw.html
> >>> 
> >>>
> >>>      
> >>>
> >>That's one sweet board.  Although as well as the base price
> >>of board, CPUs, and RAM, you also need to consider that running it
> >>24/7 would probably triple your electricity bill...
> >>
> >>It just occurred to me to wonder what OS they expect people to run
> >>on this hardware. Certainly not Windows; last I heard it still only supports
> >>two CPUs.  Could it be that they're actually targetting this at the
> >>hi-performance Linux cluster market?
> >>
> >>    
> >>
> >Yep. That's the market. With heat sinks in place on the mobo and
> >daughterboard, that should put the tray at 4U. By using a half-rack case
> >(<15" depth) and external power (and some SUBSTANTIAL cooling) a 42U x
> >30" rack could hold 160 CPU's and 2560 GB RAM and still have room for a
> >48 port Gb switch (or a fiber channel switch since each tray is 4U and
> >has room for a dual FC card!).
> >
> >Of course that rack would cost upwards of $800k !!
> >
> >  
> >
> >>-- JK
> >>
> >>
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> >>    
> >>
> >>------------------------------------------------------------------------
> >>
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> >>
> 
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-- 
James P. Kinney III          \Changing the mobile computing world/
CEO & Director of Engineering \          one Linux user         /
Local Net Solutions,LLC        \           at a time.          /
770-493-8244                    \.___________________________./
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
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