Stonehedge is back!

stonehedge

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LOL I haven't been gone for long! Most of that is mine although there are a few contracts to top up. I don't have regular access to hardware though. I only get to use it during downtime.

I'm planning on building a really big rig soon though. I need a new project.
 
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Miner237

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yeah buddy we missed you, I had picked up some rentals while you were gone but not nearly at this level, it's good to see you back I hope you didn't take my joke seriously. How BIG are you going to build? Sky is the limit..... I always wondered with the big 50+ card farms are they all data centers? is there a collections of peoples rigs photos somewhere, in our forums? I read theses rental descriptions air cooled and monitored 24x7 and I wonder what it REALLY looks like......ya know
 

Ignition75

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yeah buddy we missed you, I had picked up some rentals while you were gone but not nearly at this level, it's good to see you back I hope you didn't take my joke seriously. How BIG are you going to build? Sky is the limit..... I always wondered with the big 50+ card farms are they all data centers? is there a collections of peoples rigs photos somewhere, in our forums? I read theses rental descriptions air cooled and monitored 24x7 and I wonder what it REALLY looks like......ya know
Ya they all say Datacentre, 24/7 monitoring bla bla bla...

This was my setup, but I've sold most of it off, electricity is to $$$ in Australia:

 
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Miner237

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Wow my problem is where do I put all these miners I would like to find some sort of office space for rent with power included. I wonder if anyone is going rouge for power, I've seen MMJ growers in Colorado who dug underground to get to the non metered power line and then spliced onto it live for free power.....Was thinking about loading up some rigs in my car and parking in this one Walmart that has a power outlets at one of the lampposts.....HAHA
 

Ignition75

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Wow my problem is where do I put all these miners I would like to find some sort of office space for rent with power included. I wonder if anyone is going rouge for power, I've seen MMJ growers in Colorado who dug underground to get to the non metered power line and then spliced onto it live for free power.....Was thinking about loading up some rigs in my car and parking in this one Walmart that has a power outlets at one of the lampposts.....HAHA
When I lived in the UK, a good mate of mine grew a lot of "plants" in the attic. He also managed to pull power to the house from the other side of the metre, so it wasn't registered. I tried so many electricians here in AUS, none of them were dodgy enough to do it, I guess I don't hang around in the right circles since I've moved back home to Aus.

When mining was profitable I could afford to pay the rent and power with the proceeds, then as profits dropped I moved into the warehouse to save rent... Now, I'm selling off all the rigs and buying masternodes, it's a much more cost effective way to obtain DRK.

I'm keeping two token NVIDIA rigs, to help with securing the network, however my mining days are over sadly...
 

stonehedge

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Somebody I knew in the UK dug through his basement, under the pavement and spliced into the street lighting power feed from there.

In terms of what I'm doing, I'm hoping to call in a favour and run a quick PoC with one of these:

http://www8.hp.com/us/en/products/enclosures/product-detail.html?oid=1844065

loaded with one of these (fully pimped out at 512GB)

http://h20195.www2.hp.com/V2/GetPDF.aspx/4AA4-2743ENW.pdf

If it works with one GPU blade then I'm pretty sure it'll run with 16 in :)

If/when I get access to the hardware (I know of two C7000 not in use in a data-centre that I used to manage but I don't have any GPU blades I'll post a thorough writeup with photos :)
 

Ignition75

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Somebody I knew in the UK dug through his basement, under the pavement and spliced into the street lighting power feed from there.

In terms of what I'm doing, I'm hoping to call in a favour and run a quick PoC with one of these:

http://www8.hp.com/us/en/products/enclosures/product-detail.html?oid=1844065

loaded with one of these (fully pimped out at 512GB)

http://h20195.www2.hp.com/V2/GetPDF.aspx/4AA4-2743ENW.pdf

If it works with one GPU blade then I'm pretty sure it'll run with 16 in :)

If/when I get access to the hardware (I know of two C7000 not in use in a data-centre that I used to manage but I don't have any GPU blades I'll post a thorough writeup with photos :)
You're using these to mine x11?
 

stonehedge

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No, just arranging a POC.

If it works with a single GPU blade then I'm going to see if I can call in some favours and borrow the super high spec GPU blades that TV stations use for encoding/decoding multiple HDTV broadcast feeds. I've heard (although not confirmed) that they can encode 16 channels in 1080p through each blade.

The reality of it is that it probably won't work and even then would require new mining software.

I just figure that while I have access to this kind of hardware it'd be silly not to see what happens.
 

Ignition75

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No, just arranging a POC.

If it works with a single GPU blade then I'm going to see if I can call in some favours and borrow the super high spec GPU blades that TV stations use for encoding/decoding multiple HDTV broadcast feeds. I've heard (although not confirmed) that they can encode 16 channels in 1080p through each blade.

The reality of it is that it probably won't work and even then would require new mining software.

I just figure that while I have access to this kind of hardware it'd be silly not to see what happens.
OK well I know a few Cuda guys that would probably enjoy giving you a hand on this, if you do actually actually have some success and would like an optimisation.

You could be onto something big here...
 

stonehedge

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OK well I know a few Cuda guys that would probably enjoy giving you a hand on this, if you do actually actually have some success and would like an optimisation.

You could be onto something big here...
Or wasting my time :D

I still like the idea of distributed CPU/GPU mining on a larger scale but I can't work in two directions at once. There is even the technical possibility of not needing mining at all.

In the meantime I'm just going to have some fun and try to waste as little money as possible. :D
 

Miner237

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yeah but what is power consumption on that bad boy, this has to be a good 5000+ kw ps
 

Ignition75

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Or wasting my time :D

I still like the idea of distributed CPU/GPU mining on a larger scale but I can't work in two directions at once. There is even the technical possibility of not needing mining at all.

In the meantime I'm just going to have some fun and try to waste as little money as possible. :D
Totally against the spirit of Crypto but if it means you can do it piss farting around with spare cash, then there's people already doing it abusing the system. Then, we can react accordingly...

I'm jealous, I want to play with cool toys as well ;)
 

stonehedge

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I'm firmly in the "we need miners" camp. Don't worry about that.
 

stonehedge

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The best bit is that part of livening up a new data centre is load testing the air cooling and checking for hotspots which means that we sometimes need to run all hardware at load for a period of time and use thermal cameras to spot "dead spots" of air circulation. Amongst my colleagues and compatriates, we've found that CPU mining 128 quad Xeon (thats four Xeon CPUs, not just cores) G7 blades is quite a good way to get a high load and try to warm a room!

You can only do it for a limited period of time (6 hours tops) but it really is the best way to check that your front to back or under floor cooling is working.

Sadly I think I'll have less of these opportunities in future as cooling systems are changing. I've worked on a few water cooling projects and under floor air extaction where the rack is hermetically sealed to the floor is starting to take off again. In those configurations, hot air is sucked out of the bottom of the rack and cold air blown into the top. It works quite well if you're careful when racking up your kit.
 

Miner237

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The best bit is that part of livening up a new data centre is load testing the air cooling and checking for hotspots which means that we sometimes need to run all hardware at load for a period of time and use thermal cameras to spot "dead spots" of air circulation. Amongst my colleagues and compatriates, we've found that CPU mining 128 quad Xeon (thats four Xeon CPUs, not just cores) G7 blades is quite a good way to get a high load and try to warm a room!
.
I think I need to switch jobs...
 

Sub-Ether

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Stonehedge, would peltier cooling devices slapped straight onto the walls attached directly to the cpu heatsinks work as cooling devices thus transferring the heat directly into the ground or would this an inefficient use of electricity. Another way might be a ground source heat pump in reverse?
 

stonehedge

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It isn't really a question of could it work, more of a question of how could you do it? A fully loaded blade chassis is a very dense device with no room to gain entry to the CPU heatsinks without interrupting airflow. In fact, airflow is king when it comes to DC cooling. This is an extract from Cisco's data centre bible to give you an idea of the mainstream (and high budget) way of doing it.

Screen Shot 2014-10-20 at 23.05.40.png


As a rule, ambient air is sucked into the front of a rack and blown out the back hot. To cater for this you ned to ensure that you have hot and cold aisles within your DC. Your HVACs take in warm air at the top and blow it under the false floor where it is channeled to vented floor tiles in the cold aisles of your DC. Hot air goes out the back and with the right airflow rises to get sucked into the HVACs, cooled and recycled back to the fronts of the racks via the floor vents in the cold aisles.

Within each rack you need to be careful to not leave gaps inbetween equipment without blanking plates because that will fuck with your airflow.

This is the old school way of doing things. More info here: http://www.cisco.com/c/en/us/soluti.../unified-computing/white_paper_c11-680202.pdf

This is one variation of the new way of doing things (using curtains or sliding doors)

cold-air-plenum.jpg


There are loads of ways to do this, some better than others.

I will never permit water cooled racks in my DCs. I've never heard of a problem with them before, they work very well. I've just had too many floods from other sources to risk adding another one :D

Other than airflow, n+x redundant cooling units are essential. Air lock doors help in big DCs.

Common oversights are forgetting to factor in heat given off by lighting and also engineers working in the room. A human at rest gives off 100-200w of heat. This is a bit more if they are working hard loading up SAN chassis and collapsing carboard boxes!
 
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stonehedge

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I didn't answer your question. Yes, I think ground water cooling and reverse heat exchangers could be used to lower power bills but not as primary cooling mechanisms.

Don't get me started on ideal humidity and temperatures. That is a topic for considerable debate!
 
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Sub-Ether

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Stonehedge, you certainly know your stuff, I can remember doing a calculation in University for heat loss through walls, and basically almost all of your heat is lost through conduction of the surfaces, of course if the walls are well insulated this will exacerbate the problem.And the walls will only transfer so much depending on the heat differences and the wall composition.Am surprised 200 watts of body heat makes much difference as you gotta be talking many thousands of watts in these large server setups.
 

stonehedge

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Thanks!

Ideally, the air in your room won't be heating the walls up so you shouldn't have that problem....just a big electricity bill! What you say is correct though. I had to replace and then decom a large and periodically failing data centre built in a brick building dating back to the very early 1800s or late 1700s in 2009. Lets just say they built walls thick back then! We had cooling problems and whenever the air conditioning failed, it'd take up to 48 hours for the walls to cool back to ideal ambient temperature. I wish I could tell you more about that project but sadly I can't.

You're right, lighting and person heat output is tiny but considering that both can also contribute to turbulence, I always factor those loads in too.
 
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Ignition75

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Which is why the future has to be using our mobile phone's, 50% of the CPU & Battery lets say to help secure the network...
 

stonehedge

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Who on earth has managed to rack up 10 million invalid shares on the official pool? I managed to submit 4 million invalid shares in under a minute last night but I got booted because of it! yibble?
 

yibble

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Apr 8, 2014
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Hey Stonehedge,

I've located a few suspects. However, the Stratum server doesn't log everything. Or more accurately, to have the Stratum server log everything would cause a degradation in service.