Topic: [CLOSED] Ninja Group Buy #5 - QTY 8 Gridseed LA6M 48Mhash Scrypt [0/160] - page 8. (Read 22432 times)

I am not using a USB hub so maybe it is mostly a hub thing... but I have yet to have a single hang up once I was hashing away in cgminer... but again I have a single unit not a whole stack of them.

My understanding from other posts thus far is people are struggling with your hang up issue because the included hub is shit... SHIT. Apparently... it may not be providing enough STABLE power and when one device goes out, the whole hub has to be restarted. I DID experience something like this in my initial testing playing with the miner applications... the USB must be unplugged and plugged back in (or power cycled) in order for the miner to be picked up again... this arose when I was playing with frequencies to get the best rate. The reason you have to power cycle the HUB is that the board itself on each device draws ZERO power from the PSU itself... the damn things will mine on USB power alone so any fluctuation in temp and hashrate can cause a power spike... overdrawing on the hub... causing the hub to fail and require the disconnect and reconnect of the device before hashing will start.

Some have chosen much higher quality hubs with better peak power performance which seems to resolve these issues. So far since I found my best settings... I was dual mining on Win 7 64 bit with my unit... zero hang ups... 7 GH/s SHA256 and 330 KH/s scrypt. I do not have this on my KILL-A-WATT yet but when I get up in the AM and find I have had no stability issues with the cgminer 3.7.2 for scrypt, I will start them again on it to get a power draw in dual mode. Dual requires one cgminer 3.8.5 miner for SHA256 and then a second minerd launched with the --dual flag for scrypt.

FYI I was able to push mine to 1000 clock in cgminer but didn't like how slowly shares came in... 900 settled back to a good rate and has me at 383 KH/s in cgminer. These little work horses have a TON of headroom... the firmware is sadly very flimsy and can't handle the big guns yet... time will tell if we can double their performance.

We are using the lightning asic tp-link controllers and a remote power switch to power cycle when the USB bus hangs.  Does a PC platform give you much of an advantage performance wise or stability wise?  It looks like the tuning options are better, but how is the stability?  The tp-link boots up pretty quick, I'd hate to have to keep cold-starting a server/pc to recover the USB bus. I guess we could probably root and install this on our TP links without too much difficulty. 

We're going to have to put in a couple of servers to do the pool right.  The front end and stratums will be on 2 different VM's on one server in the DMZ, and the database and coindaemons will be on the other on our LAN.

so quick question... you on the modded cpuminer with the power fix that makes these ~8W per unit on scrypt?

Also, I figure you are on Linux so... here ya go...

https://github.com/dtbartle/cgminer-gc3355

nice cgminer 3.7.2 with gridseed support and full stats minus temps (guess there is not a sensor?) and has the same power fix so ~8W per unit.

As discussed via PM, here the rest (2.3 BTC) for my 5 reserved shares.

txid: https://blockchain.info/tx/73b2c82ebe3e69da1b232476b1ababe3734d28d07d9b7b472494f63bf2126c57

Dividends for all of my 7 total shares to this address please: 16HTJx4cWsEP2GeLHhEWrTVSaFnmXwVmXT

thank you ;-)

Yay! A win is a win.

I gave up on trying to stuff them in the cab (was doing 30 per 2U space).  We now have them on top of our cabs, it looks totally awesome.  I'll try to get a photo once we deploy the remaining 40.  Cases would add too much additional cost.  We already had to buy remote power strips to try to manage the resets.

I'd love to hear lessons learned from running a pool.  I've run some websites before so I know the basics and we have CDN bandwidth for any static content.

I'm thinking the front end, stratum, and database/coind all need to be on separate servers.  We can load balance the front end if we get huge, and add additional stratums to improve user performance.  It's really tempting to throw the machine on the DMZ and just roll with it, but it's probably best to be cautious.

We mined our first block, a bit of a crappy one with only 8661 doge; but at least we know the pool is working!  http://dogechain.info/block/467645b8e15aad97418890956111aaa9701323deb7ee81ea09dd43bb8d7d69ce

Hey Ninja,

This might help the cause:

If you would be open to it, I can point a few people your way that can help in this matter... even if it is just answers. I know a few pool operators that already have a ton of experience going through these types of fortifications.

I registered a domain for the pool, so we are totally intending to open it up.  http://www.coindesk.com/coin-miners-dogged-mining-pool-security-flaws/ this kind of stuff makes me a little nervous though; we need to take some time to ensure we can properly lock everything down.

Same here, I have 40 of those badboys in order and unless there is a fireware update that fixes the problem that they can't handle high difficulty I'm looking for a nice pool to run with. Doing it on our GB pool will help the group and help me getting better results!

+1

Was able to source a pretty cheap LA3M.... Will arrive in a week or so.

Please open this up to your owners so we can help... I have my own gridseed now as well as my GPU and I would happily mine at our DOGE pool.

+1

We are now solo mining doge in our own private pool. Give me a few days to work on getting the rest of the pool software setup so I can publish an API back to the coinninja.com website. Our pool is totally DDOS proof (it's behind our firewall).  It's nerve racking waiting to hit our first block.

Sorry to hear that, thanks a lot for putting so much effort into installing these.

Plus there's (according to the statspage) only 1.65 BTC to distribute. No problem rolling that over into the next week

We haven't paid out on this one, it doesn't have all it's hardware yet and we are still trying to get it deployed.  One of the gridseed miners mangled my finger yesterday, lots of drama with the install. We are continuing the install today, and more miners are expected to arrive tomorrow.  These things are a royal pain in the ass to setup in a constrained space;  I would rather work with GPUs. Watch out for those fans...ouch.

We still havent got paid out for this GB this week right? I just want to make sure

We should probably power mine AUR for 24 days