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32 cores of fast ARM in half-depth 1U case

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Re: 32 cores of fast ARM in half-depth 1U case

#31
post #24

The picture shows 8 tiny fans mounted inside (not counting the fan probably inside the PS) I would have thought that part of the reason for going to ARM is the low power - hopefully no moving parts. It would have been cool (ha) to see them pull it off without fans.

When you have 608 of those in a rack I think the fans are very welcome :)

Re: 32 cores of fast ARM in half-depth 1U case

#32

Calxeda has been building 16 core cards[1] for awhile now with about 18 fitting in a 1U-sized box[2], each card connected by 10GbE similar to this[3]. [1]: http://www.calxeda.com/technology/products/energycards/quadn... [2]: http://semiaccurate.com/2011/11/03/calxeda-launches-a-4-core... [3]: http://www.calxeda.com/wp-content/uploads/2012/06/EnergyCard...

Not to mention Tilera, who makes 36-core chips/cards [1], with 4 in a 1U box [2], with each processor with connected to each its four neighbors by a 250 Gb/s link. [1] http://tilera.com/products/processors/TILE-Gx_Family [2] http://tilera.com/products/platforms [3] http://www.tilera.com/technology

Interesting that these can run a single OS as a huge multi-core machine.

Re: 32 cores of fast ARM in half-depth 1U case

#33

Imagine a Beowulf of those!

I know you meant that as a joke, but I'd imagine one of these really would be an excellent candidate for being turned into a cluster.

I meant it as a joke, while also recognising that it would be ideal for being turned into a cluster. It's made me nostalgic about the days when I built Beowulfs at university!

Re: 32 cores of fast ARM in half-depth 1U case

#35

Calxeda has been building 16 core cards[1] for awhile now with about 18 fitting in a 1U-sized box[2], each card connected by 10GbE similar to this[3]. [1]: http://www.calxeda.com/technology/products/energycards/quadn... [2]: http://semiaccurate.com/2011/11/03/calxeda-launches-a-4-core... [3]: http://www.calxeda.com/wp-content/uploads/2012/06/EnergyCard...

Not to mention Tilera, who makes 36-core chips/cards [1], with 4 in a 1U box [2], with each processor with connected to each its four neighbors by a 250 Gb/s link. [1] http://tilera.com/products/processors/TILE-Gx_Family [2] http://tilera.com/products/platforms [3] http://www.tilera.com/technology

It might be worth pointing out that TileGX isn't ARM.

It is an interesting system though.

Re: 32 cores of fast ARM in half-depth 1U case

#36

Calxeda has been building 16 core cards[1] for awhile now with about 18 fitting in a 1U-sized box[2], each card connected by 10GbE similar to this[3]. [1]: http://www.calxeda.com/technology/products/energycards/quadn... [2]: http://semiaccurate.com/2011/11/03/calxeda-launches-a-4-core... [3]: http://www.calxeda.com/wp-content/uploads/2012/06/EnergyCard...

Not to mention Tilera, who makes 36-core chips/cards [1], with 4 in a 1U box [2], with each processor with connected to each its four neighbors by a 250 Gb/s link. [1] http://tilera.com/products/processors/TILE-Gx_Family [2] http://tilera.com/products/platforms [3] http://www.tilera.com/technology

But Tilera uses its own architecture, ARM on the other hand is nearly everywhere.

There were other companies like Tilera: Transputer, Connection Machine.......SiCortex was founded in 2003 with a similar idea and was shutting down by 2009

The problems with these architectures is cost: mass market tech like x86 and ARM offers more bang for your buck

Re: 32 cores of fast ARM in half-depth 1U case

#37

From my understanding of ARM architecture, ARM cores cannot process heavy data loads in a power-efficient manner, making TDP under heavy server conditions prohibitively high. Am I right about this? I've never tried making an ARM server of my own.

What understanding is it that you have that suggests that? It can shovel data via DMA as well as the next architecture.

Re: 32 cores of fast ARM in half-depth 1U case

#38
post #37

From my understanding of ARM architecture, ARM cores cannot process heavy data loads in a power-efficient manner, making TDP under heavy server conditions prohibitively high. Am I right about this? I've never tried making an ARM server of my own.

What understanding is it that you have that suggests that? It can shovel data via DMA as well as the next architecture.

Well I'm not referring to reading/writing from a data store, but actually processing the data in registers and such. Arithmetic operations and that sort of thing.

Re: 32 cores of fast ARM in half-depth 1U case

#39
post #30
post #26

Earlier quoted context omitted.

Been a while since I was heavily involved in high-density data centers... How does that work with traditional hot aisle/cold aisle layouts? Seems like you'd need to adjust the cooling to have an air channel up the middle of the rack?

You could do, or have one of them exhaust to its "front", and the other exhaust to its "back".

So the one at the "back" is getting pre-warmed air. Wouldn't this be a problem?

*Note I am used to normal data-centers but not high density stuff. I don't know of the special provisions a high-density setup would have.

Re: 32 cores of fast ARM in half-depth 1U case

#40
post #30

Earlier quoted context omitted.

You could do, or have one of them exhaust to its "front", and the other exhaust to its "back".

So the one at the "back" is getting pre-warmed air. Wouldn't this be a problem? *Note I am used to normal data-centers but not high density stuff. I don't know of the special provisions a high-density setup would have.

In general, high-density or supercompute systems are installed with custom racks, cooling, power supplies, etc. This doesn't need anything custom, just something that isn't always the default in some DCs.

They're ARMs, they don't need much cooling anyway.

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