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[#] Mon Mar 04 2024 22:24:59 EST from IGnatius T Foobar

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Yup. That was at lunchtime. It ran stable all afternoon so after work I took it down to the workshop, soldered and heatshrinked all of the wiring changes I made, and put it back together. It's sitting on the shelf in my office now and it's adorable. I've got an old 800 GB SSD in it now, but I'm expecting three more drives from a super secret source in the not too distant future, which is when I'll move my hosting stuff onto it.

As a test, I ran `stress -c 16` for a while to see what it would do under load. All cores went to 100% and the clock speed pegged at 3.1 GHz, but it's quite stable. Then I rebooted it with turbo boost enabled and ran the test again. The machine shut down the moment the test started, confirming my findings.

Now here's something funny. I loaded up Citadel in a container and ran its load test program. The load test program ran a second or two and then raised a floating point exception. It did that over and over again. I thought I had uncovered another hardware problem. After some navel gazing I realized what was happening. It has an "operations per second" counter that uses the formula:

ops per second = ops completed / (current_time - time_started)

And this is the first machine I've tried it on that was fast enough and parallel enough to do that calculation (which happens in the initial thread after it has launched all the others) while the elapsed time was still less than one second. I think that's a good thing!

[#] Tue Mar 05 2024 06:48:50 EST from Nurb432

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ah so that explains the noise i heard.  Divide by zero is always disruptive.

 

:) 



[#] Fri Mar 08 2024 17:59:01 EST from Nurb432

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ooo  some cloud provider is offering data center level RISC-V for cheap.  TH1520 SoC, 16GB RAM, and 128GB eMMC storage, for about 20 bucks a month...

 

One source ->  

https://www.techradar.com/pro/worlds-first-aws-rival-launches-bare-metal-servers-based-on-chinese-risc-v-cpu-and-costs-only-cents-per-hour-to-run-but-will-it-live-to-regret-using-emmc-storage



[#] Sun Mar 10 2024 14:41:05 EDT from msgrhys

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Ugh China.

Fri Mar 08 2024 17:59:01 EST from Nurb432

ooo  some cloud provider is offering data center level RISC-V for cheap.  TH1520 SoC, 16GB RAM, and 128GB eMMC storage, for about 20 bucks a month...

 

One source ->  

https://www.techradar.com/pro/worlds-first-aws-rival-launches-bare-metal-servers-based-on-chinese-risc-v-cpu-and-costs-only-cents-per-hour-to-run-but-will-it-live-to-regret-using-emmc-storage



 



[#] Sun Mar 10 2024 20:09:26 EDT from Nurb432

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They lead the way for RISC-V, due to sanctions and such.     All those things do in the long run is make your enemy self-sufficient. 

Sun Mar 10 2024 14:41:05 EDT from msgrhys

Ugh China.

 

 



[#] Mon Mar 11 2024 22:06:22 EDT from msgrhys

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China is going to try that whether we sanction it or not. We need to cut off all trade with communist/socialist nations, it has cost us too many jobs and factories.

Sun Mar 10 2024 20:09:26 EDT from Nurb432

They lead the way for RISC-V, due to sanctions and such.     All those things do in the long run is make your enemy self-sufficient. 

Sun Mar 10 2024 14:41:05 EDT from msgrhys

Ugh China.

 

 



 



[#] Thu Mar 21 2024 11:34:30 EDT from IGnatius T Foobar

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Well yes, we do need mega-tariffs to restore the balance of trade that they're manipulating. We do like our cheap hardware, though.

But it just goes to reinforce the old rule: "License your technology on favorable terms or it will be cloned." ARM Holdings had better be paying attention, since they will soon no longer have a lock on the "cheaper than Intel" space.
Low power consumption and favorable licensing terms have rocketed ARM to fame and fortune, but a fully open and commoditized technology is a game changer once it reaches critical mass. Just ask Sun/HP/IBM/etc. how their unices are doing.

Give it another decade and Apple will move. They're already on their fourth ISA and have shown they can change over without losing their step.

[#] Thu Mar 21 2024 12:51:41 EDT from Nurb432

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Wait until i get my RISC board this fall.  At that point im out of the market and dont care anymore.

Thu Mar 21 2024 11:34:30 EDT from IGnatius T Foobar
Well yes, we do need mega-tariffs to restore the balance of trade that they're manipulating. 

 



[#] Sat Mar 23 2024 12:01:17 EDT from IGnatius T Foobar

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All righty then ... back to the topic of the mighty but diminutive kremvax, which is now idling in my basement fully configured but awaiting the rest of its storage (a friend has some good enterprise grade drives but I have to find a way to get them here).

As a refresher: kremvax is an i9-9900 ITX powered by a PicoPSU-120, but I bypassed the PicoPSU and split the 12 volt input directly into the P4 CPU power socket. The power brick feeding it is still 120 watts, but because of the mod I could probably go higher; but I'm not interested because 3.6 GHz x 16 threads is more than enough for my workload.

Now for the question: how can I build a decent UPS for this thing? I've been scouring the Interwebz for "12 volt UPS" and am finding plenty of plans (and prebuilts) for little power supplies with 18650's or LiFePO4 cells, designed to keep your router and wifi up and running. I've already got that. I need something that can push 120 watts (10 amps @ 12 volts) -- not for hours and hours, just long enough for an ATS to operate, or if it's a "real" outage (rare around here) for me to get the generator started.

Does anyone know where to get plans for such a thing? Or barring that, how to design one? I know you can't just drop a battery across the power supply positive/negative leads and hope for the best, because that could overcharge the battery, and also backfeed the supply when it's not charging. What kind of Battery Management System can handle what I'm trying to do?

Some people say "get a consumer grade UPS and tie into the 12 volt side".
Others say don't do that because a consumer grade UPS isn't built to charge and invert at the same time, which is why the 120 volt side is just a feed-through when the unit is not operating in discharge mode.

Someone with electric knowledge more jedi than mine, help me out here?

[#] Sat Mar 23 2024 13:44:06 EDT from Nurb432

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Myself i woudl just buy one of those solar batteries, instead of a 'real' ups. ( i refuse to call them a generator :) )  They do the same job, and seem cheaper.  Most, tho not all so you have to read, will do pass thru charging.  Can get them in most any size you want, from enough to charge a phone a couple of times to running a house.. depending on how long you want it to run. Most have 12v native output along side 110

 

And i say buy it not build, as i did that a year or 2 ago myself for solar panels. By the time i got all the bits and pieces, it was so close to the same price it was stupid of me to hack something together.



[#] Thu Mar 28 2024 19:15:23 EDT from IGnatius T Foobar

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Those things seem pretty expensive. Over USD$1000 for even a small one. I can't imagine a passthrough charger, a decent battery, and a regulator could cost that much.

[#] Thu Mar 28 2024 20:40:03 EDT from Nurb432

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I paid ~ 300 for the last few i got. Not sure where you are seeing 1k for small ones.   

Seems they are on sale. for just over 200 ->  https://www.amazon.com/VTOMAN-Portable-Generator-Expandable-Regulated/dp/B0BBDQ5NNN

Thu Mar 28 2024 19:15:23 EDT from IGnatius T Foobar
Those things seem pretty expensive. Over USD$1000 for even a small one. I can't imagine a passthrough charger, a decent battery, and a regulator could cost that much.

 



[#] Fri Mar 29 2024 00:11:34 EDT from IGnatius T Foobar

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In case anyone cares, here's a photo of kremvax, the future home of uncensored.citadel.org and www.citadel.org and a bunch of other things:

kremvax.jpeg



[#] Fri Mar 29 2024 08:34:26 EDT from Nurb432

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So we are now to be in the basement? How fitting :) 



[#] Fri Mar 29 2024 18:36:26 EDT from msgrhys

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Nice.

Fri Mar 29 2024 00:11:34 EDT from IGnatius T Foobar

In case anyone cares, here's a photo of kremvax, the future home of uncensored.citadel.org and www.citadel.org and a bunch of other things:

kremvax.jpeg



 

PS: I thought you hated IBM ;-)



[#] Sat Mar 30 2024 13:54:15 EDT from IGnatius T Foobar

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I hated IBM 30 years ago when they were the ones ruining everything. That's old news. There's a story behind the 360 nameplate. My dad once said to someone "I've got the front panel of a System/360 in my garage" and I thought he meant the ENTIRE front panel with all the knobs and switches and lights, and I soooooo wanted to see it, and wire it up to make a light show! Many years later I found this in the garage. It wasn't the whole front panel, only the name badge. Now he's going senile and I'm cleaning out their garage, so this piece definitely came home with me.

Those familiar with the "kremvax" legend also know that kremvax wasn't actually a VAX, it was a Sun.

[#] Sat Mar 30 2024 14:10:33 EDT from Nurb432

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Perhaps he did have it all, at one point?

 

 

And ya, while most of us agree the centralized money suck/control the mainframes were was bad, IBM was not the worst..  it was to come after. 



[#] Sat Mar 30 2024 15:54:07 EDT from IGnatius T Foobar

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Seems they are on sale. for just over 200 -> 
https://www.amazon.com/VTOMAN-Portable-Generator-Expandable-Regulated/


I was really hoping for something *without* a 120VAC stage. Strictly DC-to-DC-to-DC.
Like a car.

[#] Sat Mar 30 2024 15:56:39 EDT from IGnatius T Foobar

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And ya, while most of us agree the centralized money suck/control the
mainframes were was bad, IBM was not the worst..  it was to come
after. 

There were systems worse than IBM. Burroughs for example had some truly horrifying machines.

Obviously it was the *culture* of suck (in both senses of the word) that surrounded IBM, then Microsoft, and now "the cloud" that we in the free world have always found repulsive.

[#] Sat Mar 30 2024 16:03:29 EDT from Nurb432

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These have 120v, 12v, and 5v output on the front panel.  They charge using DC since they are made for solar charging, but do come with an adapter if you wanted to charge via 120 instead of your 12v line..  Now,  i wasn't meaning "GET THIS ONE NOW OR YOU ARE A LOSER" it was just an example of something that wasn't 1k.. and does have the 12v out you need for your devices.

Sure, it wont last weeks as its not THAT big.. but since all you are worried about was the down time before the generator came on, its more than enough.  And its portable. 

Sat Mar 30 2024 15:54:07 EDT from IGnatius T Foobar
Seems they are on sale. for just over 200 -> 
https://www.amazon.com/VTOMAN-Portable-Generator-Expandable-Regulated/


I was really hoping for something *without* a 120VAC stage. Strictly DC-to-DC-to-DC.
Like a car.

 



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