cooling door

2008-03-29 Thread Paul Vixie
page 10 and 11 of http://www.panduit.com/products/brochures/105309.pdf says there's a way to move 20kW of heat away from a rack if your normal CRAC is moving 10kW (it depends on that basic air flow), permitting six blade servers in a rack. panduit licensed this tech from IBM a couple of years

ATT lack of customer service

2008-03-29 Thread Patrick Torney
Hi folks: This is my first posting to this email group. If I am at the wrong place for what I'm asking, I humbly ask for the your collective indulgence. I am having a problem with a service order with ATT and I am getting nowhere with their sales organization. My repeated inquires go unheeded

Re: cooling door

2008-03-29 Thread John Curran
At 3:17 PM + 3/29/08, Paul Vixie wrote: page 10 and 11 of http://www.panduit.com/products/brochures/105309.pdf says there's a way to move 20kW of heat away from a rack if your normal CRAC is moving 10kW (it depends on that basic air flow), permitting six blade servers in a rack. panduit

Re: cooling door

2008-03-29 Thread Jon Lewis
On Sat, 29 Mar 2008, John Curran wrote: unit...I know that it would have to be quite a bit before many folks would: 1) introduce another cooling system (with all the necessary redundancy), and 2) put pressurized water in the immediate vicinity of any computer equipment. What could

Re: cooling door

2008-03-29 Thread Alex Pilosov
On 29 Mar 2008, Paul Vixie wrote: page 10 and 11 of http://www.panduit.com/products/brochures/105309.pdf says there's a way to move 20kW of heat away from a rack if your normal CRAC is moving 10kW (it depends on that basic air flow), permitting six blade servers in a rack. panduit

Re: cooling door

2008-03-29 Thread Paul Vixie
Can someone please, pretty please with sugar on top, explain the point behind high power density? maybe. Raw real estate is cheap (basically, nearly free). not in downtown palo alto. now, you could argue that downtown palo alto is a silly place for an internet exchange. or you could note

RE: cooling door

2008-03-29 Thread michael.dillon
Can someone please, pretty please with sugar on top, explain the point behind high power density? It allows you to market your operation as a data center. If you spread it out to reduce power density, then the logical conclusion is to use multiple physical locations. At that point you are

Re: cooling door

2008-03-29 Thread Paul Vixie
[EMAIL PROTECTED] (John Curran) writes: While the chilled water door will provide higher equipment density per rack, it relies on water piping back to a Cooling Distribution Unit (CDU) which is in the corner sitting by your CRAC/CRAH units. it just has to sit near the chilled water that

Re: cooling door

2008-03-29 Thread John Curran
At 7:06 PM + 3/29/08, Paul Vixie wrote: While the chilled water door will provide higher equipment density per rack, it relies on water piping back to a Cooling Distribution Unit (CDU) which is in the corner sitting by your CRAC/CRAH units. it just has to sit near the chilled water that

Re: cooling door

2008-03-29 Thread Patrick Giagnocavo
John Curran wrote: Chilled water to the rack implies multiple CDU's with a colorful hose and valve system within the computer room (effectively a miniature version of the facility chilled water loop). Trying to eliminate potential failure modes in that setup will be quite the adventure, which

RE: cooling door

2008-03-29 Thread Frank Coluccio
Michael Dillon is spot on when he states the following (quotation below), although he could have gone another step in suggesting how the distance insensitivity of fiber could be further leveraged: The high speed fibre in Metro Area Networks will tie it all together with the result that for many

RE: cooling door

2008-03-29 Thread david raistrick
On Sat, 29 Mar 2008, Frank Coluccio wrote: In fact, those same servers, and a host of other storage and network elements, can be returned to the LAN rooms and closets of most commercial buildings from whence they originally came prior to the How does that work? So now we buy a whole bunch

RE: cooling door

2008-03-29 Thread Frank Coluccio
I referenced LAN rooms as an expedient and to highlight an irony. The point is, smaller, less-concentrated, distributed enclosures suffice nicely for many purposes, similar to how Google's distributed containers and Sun Micro's Data Centers in a box do. And while LAN rooms that have been vacated,

latency (was: RE: cooling door)

2008-03-29 Thread Mikael Abrahamsson
On Sat, 29 Mar 2008, Frank Coluccio wrote: We often discuss the empowerment afforded by optical technology, but we've barely scratched the surface of its ability to effect meaningful architectural changes. If you talk to the server people, they have an issue with this: Latency. I've

Re: latency (was: RE: cooling door)

2008-03-29 Thread Frank Coluccio
Please clarify. To which network element are you referring in connection with extended lookup times? Is it the collapsed optical backbone switch, or the upstream L3 element, or perhaps both? Certainly, some applications will demand far less latency than others. Gamers and some financial

Re: latency (was: RE: cooling door)

2008-03-29 Thread Mikael Abrahamsson
On Sat, 29 Mar 2008, Frank Coluccio wrote: Please clarify. To which network element are you referring in connection with extended lookup times? Is it the collapsed optical backbone switch, or the upstream L3 element, or perhaps both? I am talking about the matter that the following topology:

Re: cooling door

2008-03-29 Thread Robert Boyle
At 02:11 PM 3/29/2008, Alex Pilosov wrote: Can someone please, pretty please with sugar on top, explain the point behind high power density? More equipment in your existing space means more revenue and more profit. Raw real estate is cheap (basically, nearly free). Increasing power density

Re: latency (was: RE: cooling door)

2008-03-29 Thread Adrian Chadd
On Sun, Mar 30, 2008, Mikael Abrahamsson wrote: On Sat, 29 Mar 2008, Frank Coluccio wrote: Please clarify. To which network element are you referring in connection with extended lookup times? Is it the collapsed optical backbone switch, or the upstream L3 element, or perhaps both? I

Re: latency (was: RE: cooling door)

2008-03-29 Thread Frank Coluccio
Understandably, some applications fall into a class that requires very-short distances for the reasons you cite, although I'm still not comfortable with the setup you've outlined. Why, for example, are you showing two Ethernet switches for the fiber option (which would naturally double the

Re: cooling door

2008-03-29 Thread Wayne E. Bouchard
On Sat, Mar 29, 2008 at 06:54:02PM +, Paul Vixie wrote: Can someone please, pretty please with sugar on top, explain the point behind high power density? Customers are being sold blade servers on the basis that it's much more efficient to put all your eggs in one basket without being