Great explanation, thank you.

I take this means that does not always need to be the very first entry of the database file and the lines don’t need to be ordered by incrementally the "s"-key value?

Other than that the localDB branch works fine for me. Looking forward to it because I just ran into this issue again:

https://github.com/askmike/gekko/issues/51

Oddly enough it loads the first entries just fine, but gekko fails on the last (most recent) candles, retries a few times and then shuts down.I assume there are no connectivity or DNS issues, otherwise it wouldn’t be able to download the first 99 candles.

I’m currently running the localDB branch on the side and it seems to record the data just fine from what I can tell.

The db file produced seems to be similar to a CSV, but I noticed that it isn’t ordered by the first fieldname ("s").

Right now my file has entries with "s" values from 388 to 482 in a random order, then a line that says


and then entries 483 to 522 neatly ordered by their incremental "s" value.

Could you maybe give me a very short explanation of what the field names stand for?
I just wanted to make sure that this is intended behaviour.

The point of single phase 120V versus single phase 230V is that requires twice the current to transfer the same amount of power. Frequencies have nothing at all to do with this.

The high voltage connections you are talking about are three-phase (commonly 120*sqrt3 = 200V in US, 230*sqrt3 = 400V in EU).

http://en.wikipedia.org/wiki/Mains_electricity

Europes electricity standards are far more advanced than the US from todays standpoint.

I’m not burnin, but Xbox 360 PSUs works very well for 1-2 boards.

All you have to do is cut the cord, wire +5V SB and PWR_ENABLE together for "always on" mode and use the three yellow (+12V) and three black (GND) cables to power your boards.

I ran 2x20 an 1x10 with an old Xbox 360 PSU (Xeon/Zephyr version with 203W) just fine, but only up to 400 Mhz.

The nice thing about this is that you can find old 360 PSUs on ebay for less than $10 and they deliver very clean power.

More info at:
http://thevariableconstant.blogspot.com/2012/12/xbox-360-power-supply-hack.html

Where did you get that from? My 50 chips (20/20/10) run fine at 450 Mhz, 1.330 mV (it seems to overvolt slightly?) and cgminer "d" timing. Rejects and HW errors are reasonable. Temperature is around 47-49°C. I’m stuck on the old firmware because of a broken USB connector or my hashrate would be closer to the theoretical 22.5 GH/s.



I have a feeling that these chips would much higher with better cooling but burnin’s (slightly crude) cooling implementation is hard to beat for price/performance.
Putting fancy copper/heatpipe heatsinks with expensive TIMs on them would probably not make sense from a financial standpoint.

The question has less to do with math and more to do with guessing how the difficulty will develop over the next few months.

I received my boards from batch #1 last week and I am not sure if I’ll get my investment back if the hashrate keeps scaling (almost) exponentially.

25€ (at the time of writing) of shipping fees for my 50 batch #1 chips to burnin do seem a bit excessive to me.
 I imagine shipping fees for the entire package to burnin (at least 7500 chips if not more) were well under 100€ and my order is just a minuscule fraction. I’ll still pay soon.

Ah yes, I missed that posting. About the hangs, I experienced those too but got around them by starting the flash process right as I powered up the boards with no waiting in between. Even then it took 2-3 tries to get a successful flash.

Oh and be extremely careful with the micro usb jacks. One of mine broke clean off when I first disconnected it. (cold solder joint? the whole area looks quite matte and rough)

Fortunately this happened after updating the firmware, so the board runs over the CANBUS just fine. Of course that means I’m stuck with this firmware, but it seems to work flawlessly so far.

If you look really closely, you can see the micro usb-jack and PCB flex an awful lot from just the weight of the cable alone.
It is probably a good idea to zip-tie the cable to one of the bolts for strain relief. (Zugentlastung  )

Received my devices today after a week of shipping. I’m quite impressed by the quality of burnin's service regardless.

It is possible to update the firmware using a raspberrypi and arch linux after all. Somebody in an earlier posting stated that it isn’t possible, but I found it works just fine.

I simply checked out http://code.google.com/p/pic32prog/ as read-only, installed build-essentials and libusb-compat and compiled it. If you try to compile it without libusb-compat installed, you’ll get an error because usb.h is missing.

Then I had an issue where my pic32prog wouldn’t recognize the bootloaders. They always timed out. If you have the same problem, edit lines 163-166 in target.c:


to look like this:


then recompile (make && make install) and try again.

to flash, simply execute ./pic32prog BitBurner_08.05b.hex

I did all of the above the above as root, otherwise you’ll probably run into permission issues.

Yes, I have the signed recipe with a epoch time long before the deadline. No response so far.

I will probably drive to Hamburg next week because I’ll be in Hannover for a work related faire anyway.

My batch #1 order is still processing even though you stated that all batch 1 and some batch 2 orders have shipped.
Could you please look into my order?

My batch #1 order is still shows as processing. Not sure if it shipped or the status wasn’t updated yet. Anybody in the same boat?

same here, but order number #32x. I’d really want the boards to ship today.

#32x and still processing (zefir batch 1)... I guess he changed his mind about first come, first serve. Interesting.

What parts are holding back the shipping time for the batch 1 boards?
The rumours of an impending a 2.1 million chip deployment make me wonder if I’ll even make ROI with my batch 1 boards.  

From what we know burnin receives nothing at all from Avalon directly.

There are a few public group buys, and of those only zefir has received and forwarded his first batch to burnin. The other batches haven’t even shipped yet.

Of course there is always the possibility that somebody ordered a whole batch of 10k chips for himself, received them and shipped them to burnin for a "private run".

(correct me if I got something wrong)

in preparation for the arrival of my bitburners, what would be the best OS for running a few of them using a RaspberryPi?

Just curious for those who have a pending direct bank transfer for their orders, what does your order status say?

Mine says "Order status: on-hold.", but I’m not sure if that just means that it is pending payment or if there’s something else amiss.

You are not the only one. I placed my order successfully but didn’t receive any payment instructions.
I’m literally begging him to send me his SEPA bank account information, but no dice.

My chips are from Zefir’s batch #1, so at this point they will most likely arrive before my payment does. I’m starting to become a little miffed, to say the least.