[Beowulf] Roadrunner shutdown

Vincent Diepeveen diep at xs4all.nl
Wed Apr 3 12:04:48 PDT 2013


On Apr 3, 2013, at 3:27 PM, Bret Stouder wrote:

> Prentice:
>
> For the money you could buy a lot more real computational cycles  
> that last a lot longer than anything proprietary from IBM.

What's this for stupid bunch of postings you've been doing - nearby  
idiot level.

A supercomputer running classified codes in a bunker, knowing that  
most public supercomputers already have an economic lifespan of at  
most 5-6 years,
which it has reached - and they have something way faster now.

What was it 150 gflop double precision a node if i remember well,  
something like that? eating a watt or  220-250?
So that nearby 0.5 gflop a watt figure makes sense that i saw quoted.

Time to shredder it to pieces and say goodbye to the CELL processor  
computation.

>   The reason the Origins have been out of production for a long  
> time is the result of research moving to a commodity server  
> platform.  Taken a look at what Cray offers lately?  Looks a lot  
> like commodity.

You mean the K20X cpu that's in everyones computer?

Oh comeon, that's a real manycore chip of nearby $4k from nvidia  
which is really fast - yet not exactly *commodity*.

Do your homework better.

> If you are going to take the time to port code, it seems that a  
> reasonable argument could be made to stay away from Blue Gene and  
> port to Cuda or Phi.

It doesn't matter whether you code for blue gene, cuda or phi - from  
a software viewpoint it's all vector type coding you've got to do.  
the price of 1 coder is total peanuts compared to
the price of those supercomputers. So specialistic written software  
is what you need anyway.

Of course IBM will show up with new cpu's for HPC that will do well.

 From the way you posted seems you do not know the difference between  
blue gene versus the CELL processor anyway.

>
> Bret
>
> -----Original Message-----
> From: beowulf-bounces at beowulf.org [mailto:beowulf- 
> bounces at beowulf.org] On Behalf Of Prentice Bisbal
> Sent: Wednesday, April 03, 2013 8:23 AM
> To: beowulf at beowulf.org
> Subject: Re: [Beowulf] Roadrunner shutdown
>
> Bret,
>
> You lost me, and I think many other beowulfers on that one. If you  
> look at the top 500, there's plenty of Blue Genes near the top, and  
> Origins have been out of production for a very long time.
>
> Prentice
>
>
> On 04/02/2013 10:52 AM, Bret Stouder wrote:
>> A great example of why Xeon or Opteron and now PHI and Kepler make  
>> a whole lot more sense than Blue Gene or Origin.  :)  Commodity  
>> off the shelf hardware and software solutions continue to make the  
>> world go round...............
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: beowulf-bounces at beowulf.org [mailto:beowulf- 
>> bounces at beowulf.org]
>> On Behalf Of Douglas Eadline
>> Sent: Tuesday, April 02, 2013 7:38 AM
>> To: Lux, Jim (337C)
>> Cc: beowulf at beowulf.org
>> Subject: Re: [Beowulf] Roadrunner shutdown
>>
>>
>> --snip--
>>> I suspect it's a combination of factors..  power consumption is one,
>>> age is another.  At a certain point, you start having maintenance
>>> issues (Prentice's  #5 (and maybe the half dozen people who really
>>> understand how box A works are now working on box B, Prentice's #3,
>>> below), and it's time to start over.
>> In a similar vain, I would guess that another straw on the back of  
>> Road Runner is the fact that it is a unique design with no next  
>> generation or upgrade path.
>>
>> I also know that I/O rates are an important design requirement for  
>> these machines that, of course, is not addressed by HPL rank (but  
>> makes for good news stories).
>>
>> --
>> Doug
>>
>> --
>> Mailscanner: Clean
>>
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