Topic: [CLOSED] Ninja Group Buy #5 - QTY 8 Gridseed LA6M 48Mhash Scrypt [0/160] - page 7. (Read 22427 times)

I'm going to need your help when I get my LA3m. I take it I should order a raspberry pi and toss the controller I get?

In an effort to maybe increase total earnings since you have had to come out a bit more in cost to get these stable... I have found these gridseeds can easily run at 850 frequency and hit 383 KH/s without a fan and no worries of overheating as long as their is some ambient airflow. We seem to be running at about 300 kh/s now per device on average... as long as you have either the optmized cpuminer that runs ~8w per device or cgminer, you should be able to get those kinds of results easily.

That would be a jump to over 61 MH/s on average. A 27% increase just by changing to 850.

That seems to have done the trick, my miners at home are now stable.  We will be procuring 8 Raspberry Pis for this group buy.  Hopefully we can recover the cost of the Pis by selling off the TP Link controllers.

Got it, thank you!

You are correct, thankfully there's a blockchain that has all the history! I will fix it today and send your missing payment.

Have you tried this?

https://litecointalk.org/index.php?topic=9908.msg139447#msg139447

I don't know if it works since my Raspberry didn't seem to crash before, but others are reporting it fixes the issue.

I'm still a bit confused after our previous PM exchanges... the GB 5 page says 0.01483 per share * 4 shares = 0.05932, but the payment that came in was 0.0593.

On the other hand for GB 4, each share = 0.0186598190 * 20 = 0.37319638, but I got 0.3732 which is slightly more than I'm supposed to receive.  

Theres some rounding (set to 5 digits) in my Google payout spreadsheets. The rounding is a little weird, as it will show a rounded per share value, but then use the full precision for calculating the actual payout, which is then rounded to 5 digits. 

Just noticing some rounding discrepancies so wanted to ask how that is being handled... what are the rules for rounding dividend payments?

See Lines 22-25 for inconsistencies.
https://docs.google.com/spreadsheet/ccc?key=0AsVvuskew8TmdFFrLWZXbi1SQUk3SzFhcWFXbXVRd3c

Ninja, could you please check this. I should have 4 shares in GB5. Owner's list shows only 2 and I believe my weekly payment is also for 2. Thanks!

After some experimenting I think the theoretical maximum is 98 perhaps... two levels of 7-port hubs, 49 on each port. Unfortunately the "stock" 10-port hubs internally already have two levels, so can't daisy-chain those to the Pi. I left my Pi running with the 20 miners it started with, and will probably buy another one for the other 20.

Well my Pis were crashing more than the Tp Link, and then they trash the SD card some of the time, so remote reboot is risky.  They did run really fast on the Pi.  I tried running them on a beaglebone and it worked and was very stable, but the performance was lower for some reason.  I'll try on a linux PC next, so far my experience with these Gridseed units continues to be frustrating.

22 ? I've heard the PI can do about 50 in perfect setup
My distro has 200+ coming in so we'll see how they work soon in that config

Problem with Raspberry is that it can only go 2 hubs down and that it doesn't do well with usb 3.0.

Have 22 on one now but so far except for one that doesn't send shares it's looking well. I've ordered better hubs from china and expect them next week. Currently fixing my last set of 10 and see whether I can get the Pi up to 32 with my setup. It doesn't work well with hotplugging 10 at a time though

I've ordered two more Pi's and that should fix most of the problems

Can you remove (payment due) after my name on owner's list when you finalize the list.
And are we expecting payout tonight?

Bests 

I have 20 on it now, does not seem to have any issues so far. I'll try to daisy-chain a couple more hubs over the weekend and see if it can do 30 or 40.

How many can a Pi handle? This looks great and I can add it to my Pi distro.  I only have a couple of Pi's though, so we will need to order some more of them. We have an ubuntu (sick little i5 microITX rig) machine that is running our private pool, and we will be adding 2 dedicated 1U Xeon servers to take the pool public. For now we need your hashes to help with the variance. Please contact me via PM to help.

I'm using this now:

https://litecointalk.org/index.php?topic=9908.msg138204#msg138204

Fantastic so far... rock solid and totally effortless to set up. 360 Kh/s per miner.

I now have one LightningAsic with TP-Link, and two "generic" sets with the wiibox. Both controllers are crap, but the TP-Link at least works and is in English, I couldn't get the wiibox work at all. Eventually I hooked up the "generic" sets to a PC and I'm using cpuminer (can't get cgminer to work with Windows COM ports, will try Linux later). Anyway, I can now compare TP-Link vs. computer-attached solution.

TP-Link has a decent UI (with some minor quirks) with quick status/hashrate overview. That's pretty much where it's advantage ends. It restarts miners every 1-2 hours on wafflepool (~330Kh/s per miner avg), and is almost unusable on clevermining or middlecoin (restarts every 10-20 minutes). If you try to connect more than 10 miners to the box it is restarting miners more often and it also seems to become less responsive, just not powerful enough I guess.

Cpuminer on Windows lacks hashrate stats and I need to run a separate cmd window for each miner, so it's a bit of a hassle (cgminer would be better). However the miners now are running stable for nearly 24 hours at ~340 Kh/s on clevermining, 2% reject rate. Handling 20 miners was not an issue, zero CPU usage on a cheap Celeron, just a few megs of RAM per instance of cpuminer, so it can certainly handle a lot more than that. My next step will be to test it with Raspberry + cgminer + a relay to toggle USB hub power remotely (optional - if the next few days show it to be necessary).