matt-p

7 ms·

91.
by matt-p 6mo ago
I love this and agree with it almost in entirety. One thing that would be good to retain is 'regions' e.g 3 DCs under 10KM apart linked with free/very low cost internal network. It is cheap to build in colo these days with th
92.
by matt-p 6mo ago
Interesting. I've only seen /60 when they're trying to split up a /56, and IMO it's a little unclean.
93.
by matt-p 6mo ago
Sometimes, but usually polymer these days. e.g the most popular laptop is probably a macbook https://www.apple.com/uk/macbook-pro/specs/ https://www.apple.com/uk/macbook-air/specs&#x
94.
by matt-p 6mo ago
This is cool! In my experience the absolute most important factor for performance is that we are able to hold the FIB in CPU Cache, and my reading of this is that at >250K prefixes patrica may use less space? Did you find this? E.g with
95.
by matt-p 6mo ago
London is about 3X bigger than Amsterdam in terms of capacity. If you look at the core western europe market (so called FLAP-D) which I am rather familiar with London holds 35% of that market and Amsterdam about 12%. I'm not at all sol
96.
by matt-p 6mo ago
Pretty much the only way I've seen a /48 split in practice is to get 256 /56 (one per site) then 256 /64 (one per VLAN).
97.
by matt-p 6mo ago
I am surprised a serious facility would be happy having 100 old LiPo batteries in a rack. That is a (nasty) fire waiting to happen IMO. These are old batteries that may even have minor physical damage from being dropped and will be in mayb
98.
by matt-p 7mo ago
Raspberry Pi Zero 2 W (512MB) and Pi3B (1G) are both still super cheap if you can cope with that much RAM.
99.
by matt-p 7mo ago
I agree, OTOH there are many very cool things that we can build if we're able to assume a user can spare 2GB of RAM that we'd otherwise have to avoid entirely like 3D scenes with Three.js, in-browser video/photo editing. Shou
100.
by matt-p 7mo ago
Flash has supply (and price) problems too.
101.
by matt-p 7mo ago
One thing that's not super obvious, but is happening - 'AI' is increasing demand for 'normal' (e.g cpu) compute. People are building more apps because the cost of software has reduced, these need deploying somewhere
102.
by matt-p 7mo ago
[HVAC] true for the fans and controllers but surely you wouldn't DC feed a compressor.
103.
by matt-p 7mo ago
Solar and battery are already at 48v in most cases, so you are avoiding converting it to AC. I agree, it's unserious to suggest a cooker or something high power is going to run off of 48v. But for loads like lights, PC/Laptop&#x
104.
by matt-p 7mo ago
Almost all home batteries are 48v, I think it would be reasonable to standardise on that.
105.
by matt-p 7mo ago
What if all homes had battery storage and or solar? You could then simply use it's rectifier as needed or direct 48v from the solar panels. That would be even more efficient than 230v.
106.
by matt-p 7mo ago
48v is what most home battery/solar systems run off. Also coincidentally POE, IMO it makes a much more sensible candidate as it is still 'safe' while carrying 4x as much power for a given cable gauge. Consider laptops are 19
107.
by matt-p 7mo ago
One of the main problems is conductor size. I wish we could access 22AWG copper in cheap and cheerful cat5e/cat6 format cable. 24AWG cat5e, sometimes CCA is not great for doing large amounts of POE.
108.
by matt-p 7mo ago
You do pay import tax, plus admin fee to the carrier - or did last time I ordered. But factoring it in its still a great deal.
109.
by matt-p 7mo ago
AISLER are AMAZING at printing boards, but sadly are very very expensive for assembly. Love them though.
110.
by matt-p 8mo ago
Office suite, cool! Looks Inside It's a Django app.
111.
by matt-p 8mo ago
Now try it without giving it the books as context. I'm sure it probably knows there are 49.
112.
by matt-p 8mo ago
I love this! I appreciate regen breaking will be hard to add without picking a new controller and so on but perhaps you could add a DPDT switch wired into the break that adds in a string of 3 old incandescent 12v break lights.
113.
by matt-p 8mo ago
I don't think I ever said it reduced capital cost. I agree (though you might be willing to take more risk on reducing redundancy e.g instead of 2+1 cooling towers you may be more willing to just buy 2). You cannot put a power station i
114.
by matt-p 8mo ago
As a rule of thumb (obviously it varies) you spend about 1% pumping water round a heat network. So your CoP is around 99 if you consider heat truly free. It's actually higher as pump energy largely is converted to friction/heat.
115.
by matt-p 8mo ago
Yeah. This. Obviously if the objective is just to generate heat only buy a heat pump and not a B200!
116.
by matt-p 8mo ago
I actually don't think that's true. The reason HS2 route cost so much money is because so much is tunneled. Why is so much tunnelled? Because rich people live there and won't accept a blot on the landscape, partially because
117.
by matt-p 8mo ago
(DTC) Datacentres take electricity and turn it into low grade heat e.g 60c water. Put them anywhere where you've either got excess (cheap) energy or where you can use the heat. Either is fine, both is great, but neither is both bad and
118.
by matt-p 8mo ago
There is a huge amount of countryside between the WCML and the current HS2 route. I'm not saying it should be literally parallel.
119.
by matt-p 8mo ago
A problem with this argument is that it actually doesn't help most people on the HS2 route. If you live in a village on the outskirts of Aylesbury say, it's not much good to you personally that there's more local services on
120.
by matt-p 8mo ago
We have 400Gbe which is certainly faster than USB.. but; On consumer devices, I think part of the issue is that we’re still wedded to four-pair twisted copper as the physical medium. That worked well for Gigabit Ethernet, but once you push

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