Topic: [ANN] NiceHash.com - sell & buy hash rate cloud mining service / multipool - page 271. (Read 794394 times)

I'm glad to see that NiceHash finally addressed this issue at our insistence, after days on end of customer complaints. Seeing as how I'm the one that brought the issue of their failure to respect difficulty settings properly to their attention, I find their blaming of ipoMiner to be extremely disingenuous.

Let's review their claim here that ipoMiner was erroneously sending lower difficulty before sending higher difficulty with a bit more detail...

1) Sgminer, and every other mining software released to date, have always worked perfectly with ipoMiner's stratums, and show correct behavior in their console. Here's a recent example from my own sgminer I ran as a test today:


As you can see, difficulty is initially set to 1.573 and then changed to 0.016, which is the configured difficulty for that worker.

2) These issues with NiceHash began approximately 7-10 days ago, and have been ongoing since then. Users have complained about this, but they have done nothing to address the issue until now. In addition to seeing problems with NiceHash at ipoMiner, I've also heard several other large, popular pools having similar problems with NiceHash usage as well recently.

Now, during that time period, NiceHash has been under DDoS attacks and recently moved to a new proxy server, which we initially assumed were the likely causes of their problems. However, after digging into it more in the past 24 hours, I realized that the real issue is that they were not respecting difficulty retargeting properly.

3) To disprove their claim that we erroneously were sending lower difficulty before sending higher difficulty, let's look at a tcpdump of a single connection from a miner at our proxy layer:


This is for an X11 miner connection, and as you can see, just like in the sgminer console output, a difficulty of 1.572864 (equivalent to scrypt difficulty of 49152) is initially set, then the configured worker difficulty of 0.016384 is set.

URGENT ANNOUNCEMENT TO ALL BUYERS

Long version:
Lately, we have been receiving complaints that hashing rate on Ipominer is only several percents of what NiceHash reports. Today, we have been contacted by Ipominer and took a deeper look into the situation. We found out, that there was an issue with difficulty, where Ipominer pool sent lower diff before sending higher diff, but then using lower diff to calculate hashing speed. That resulted in very poor performance shown on Ipominer.

Now, we are not fully sure, what kind of software Ipominer use for stratum, but if it is something publicly available, it means that there may be other pools with same issue.

We have applied temporary fix for this situation and Ipominer is now again compatible with NiceHash.

If you detect such issue in future, please, do not hesitate to contact us, but also provide details. Claiming only that you get bad hashrate does not help us analyse the issue.

In short: NiceHash did not cheat anyone. There is a bug in stratum software used by Ipominer (and perhaps some other pools).

We don't run Darkocode wallet. We are just running stratum proxy that forwards work of miners to the remote pools.

http://wiki.darkcoin.eu/wiki/Important

This happens when our stratum terminates connection to your rig. Make sure you are not sending too many rejects.

Since the last update the service is more stable but there are still connection problems, sometimes the miner has to restart the connection sometimes not, I get lot's of following messages:

stratum_recv_line failed
Stratum connection interrupted

Will fresh algo be in nicehash soon?

Good question. I moved to trademybit yesterday when nicehash had its problems. I must be misunderstanding something here so can some check my numbers?

Nicehash    X13 paying 0.5 BTC/day/Ghash this is 0.0005 BTC/day/Mhash (1GHash = 0.001Mhash)
TradeMyBit X13 paying 0.00079 BTC/day/Mhash which is 0.79 BTC/day/Ghash (currently via APEX, but I autoexchange to BTC)

So doesn't that make TradeMyBit more profitable? 0.79 vs 0.5?
Assuming the stats are both inaccurate, then I would say my actual BTC payments are much higher with TMB?
Is this because I have just a very small minnow running around 10Mhash/s?

Interested in the views of others

How is the Payout for Nicehash compared to a decent sized ordinary multipool like trademybit.com??
Unless there are massive amount of buyer to compete with each other on the bids, the price should always be noticeably lower than a decent sized traditional multipool, given their profit switching are both efficient.

Just released a new version of NiceHash Control.  Now has features to prevent flickering between algorithms if two are paying close to the same amount.

fixed thanks

We have updated default factors several days ago. Check here what kind of default factors we use: https://www.nicehash.com/multialgo/

my miner was working good till now
here is my pools


now nciehash miningx13 but my miners mining x15

Everything seems ok now <3

A significant lack of information in that post... How is your miner configured?  Did you specify custom multi-algo factors?

front page says x13 most profitable but miners mining x15
 

We did some software upgrade now. Try it out.

Its a shame you are under DDOS attack but a 'protection' system that takes us out as well isn't so great.
There is so little profit to be had these days that dropping out unpredictably for hours isn't much use.
eg; dropping out for 2 hours in 24 means a 8% loss

Can you let us know when you think its sorted, and I will switch back?

Thanks

Guys, keep in mind, we are under DDOS attack still. The protection is doing mostly a good job, filtering most of shit out, but here and there, it may happen that you get filtered out too.