Does the Share Difficulty given to each miner matter?


You should count each share as valuable as the difficulty of the pre-determined target for that miner. If you count the actual value of the hash it found itself, either the math won't work, or you'll introduce massive variance instead of reducing it (which a pool is intended to do).

When you choose a particular share difficulty D, you are restricting the set of valid hashes to a set that is D times smaller than the set of valid hashes for difficulty 1. Given that each of such results is D times less likely to be found, it is fair to count it as D shares of difficulty. However, each hash is either good or not good, and each has a fixed probability of being good.

If you're going to use the actual hash value obtained to calculate share value, most hashes won't be valid, but those that do will introduce extra variance: some (unlikely) ones will result in a very high score, and some won't. There is no need for this: just giving each hash the same score is just as well a...

0 0

Yes, a share hash is a hash of a bitcoin block. Some of them are above the bitcoin network difficulty which means the block is valid. Most are not, and can only be used to show that you are mining (and at what rate).

The data being hashed is the block header. The block header contains the merkle root which is created from the transactions. The transactions are not part of the block header. A bitcoin block is the header plus the transactions.

With the GBT (getblocktemplate) mining protocol you do get all the data, including transactions. This could be used to try and detect if the pool is doing something bad. It could also be used as you say to let the user see the transactions he or she is including in blocks. With GBT there is even the possibility for the miner to remove or add transactions, if supported by the pool. Most of this is still not implemented by miners and pools.

Stratum had an extension to allow you to fetch the transactions for the block you are...

0 0

In the last few hours I am getting 100% connection rejections from Eligius. I am using a Mac and the Asteroid miner GUI. I also have MacMiner setup. both are not failing after about a month of successfully working. But that is not the point of the question.

Check your ISP, check luke's threads on btctalk and on eligius or their IRC chan #Eligius on freenode. They can give you the best help with support. A stackexchange unfortunately is not a support page for a website.

My question is trying to understand the pool URL, here is what Eligius provides: Stratum Host: Port: 3334 | Getwork Host: Port: 8337 GBT Host: Port: 9337

I have been using ""

Thanks for some detailed info.

Question 1: Why is the scheme missing, that is "http://", etc. It needs to be entered as part of the pool URL, what if any scheme should be entered?

0 0

Buying hashing power at NiceHash is very simple. We offer you two types of hashing power orders:

Standard bidding type: this type of order will allow you to bid for a price as low as possible, however if some other out-bids your order then your order might be paused and you may have to increase price to sustain speed. That said you have to monitor your orders to make sure you maintain desired speed. Fixed type: this type of order will allow you to place an order with fixed price and will guarantee you the desired hashing speed through order's lifetime, even if there are other bidding orders with higher price submitted later on. You will have to pay a bit higher price in relation to current fixed orders demand.

Please keep reading and

see below

for detailed explanation of each type of order.

You are also welcome to try automatic order management by using NiceHashBot, take a look at FAQ Are there any automation tools for orders and account management? for...

0 0
0 0

Litecoin Mining FAQ

We have compiled a list of the most common questions and their answers regarding Litecoin mining.

Litecoin is a virtual crypto-currency created based on the concept of Bitcoin. It has some functional advantages over Bitcoin such as faster confirmations and higher resistance to FPGA and ASIC mining.

How are new Litecoins created?

New coins are generated by a network node each time it finds the solution to a certain mathematical problem (i.e. creates a new block), which is difficult to perform and can demonstrate a proof of work. The reward for solving a block is automatically adjusted so that in the first 4 years of the Litecoin network, 42,000,000 LTC will be created. The amount is halved each 4 years, so it will be 21,000,000 over years 4-8, 10,500,000 over years 8-12 and so on. Thus the total number of coins will approach 84,000,000 LTC over time.

How does the halving work when the number gets really small?

0 0

Video Guide

What is Darkcoin?

DarkCoin is the first privacy-centric cryptographic currency with anonymous block transactions powered by DarkSend. We currently have a fully functional public beta for DarkSend, see below.
DarkCoin uses a new chained hashing algorithm approach, with many new scientific hashing algorithms for the proof-of-work. This is so that the processing distribution is fair and coins will be distributed in much the same way Bitcoins were originally. ASICs will be much more difficult to make for these algorithms and will take years.
With the chained hashing, high end CPUs give an average return similar to that of GPUs. Another side effect of the algorithm is GPUs run at about 30% less wattage than scrypt and 30-50% cooler.

Online Wallet– Direct Wallet Link

More Info –Tech Specs , Current Ranking

Exchanges –,

How t0 Mine DarkCoins?

1.)Disable your Antivirus....

0 0

VARDIFF stands for Variable Difficulty. This essentially means that the difficulty of your shares will rise and fall depending on your hashrate. Please note that your hashrate on the site may rise and fall drastically. This is more of an annoyance then anything else due to stratum recalculating the difficulty to your miner.

How does this affect miners?

Variable difficulty will benefit both low hashrate and high hashrate miners. Variable difficulty will fluctuate your share difficulty so that your miner submits 4 -10 shares a minute. This will drastically reduce load on the backend as well as make your miners shares more efficient in helping the pool find blocks. Currently we run a capped diff server which is currently uncapped to help reduce server load.

My shares are different does this affect my payment!?

No your payment will not be affected. All shares submitted to the pool are recorded at the difficulty your miner submits and is calculated by the...

0 0

Bitcoin mining pools are a way for Bitcoin miners to pool their resources together and share their hashing power while splitting the reward equally according to the amount of shares they contributed to solving a block.

A "share" is awarded to members of the Bitcoin mining pool who present a valid proof of work that their Bitcoin miner solved. Bitcoin mining in pools began when the difficulty for mining increased to the point where it could take years for slower miners to generate a block.

The solution to this problem was for miners to pool their resources so they could generate blocks quicker and therefore receive a portion of the Bitcoin block reward on a consistent basis, rather than randomly once every few years.

Network Consensus

If you solo-mine, meaning you do not mine with a Bitcoin mining pool, then you will need to ensure that you are in consensus with the Bitcoin network. The best way is to use the official BitCore client.

If you...

0 0

There are two different difficulty settings you can specify. Share Difficulty and Pseudo Share Difficulty. It is important you understand the difference between these two settings.

Share Difficulty by address is shown in the Active Miners on This Node section.

Share Difficulty: address/
Sets the share difficulty for shares that count towards a payout.

P2Pool takes the Total Hash Rate on each node and assigns a share difficulty for that node based on that number. This means that large miners may increase the share difficulty on a node to a point where smaller miners are working on shares too difficult for their speed.

The maximum a node can raise the share difficulty is 30x the P2Pool share difficulty. To determine the maximum share difficulty find the P2Pool share difficulty displayed in the Status Section for your pool and multiply by 30.

The P2Pool share difficulty displayed in the Status Section is the lowest share difficulty that can be...

0 0

Miner credits (Top 100)

Each submitted share will increase the credit of the miner who submitted the share by the share difficulty.

The miner who accumulated the most credits will receive the reward of the next mined block and his credits will be reset to his current credits minus the credits of the runner up miner.

Re-setting the credits of the miner who did receive the block reward to 0 was abandoned as it did penalize miners having an above average hashrate.

Usually a miner will receive a full block reward as soon as his accumulated credits equal the current block difficulty (+/- pool luck).

Uncles are paid on top of the full block rewards! Which means you will receive at least 5 Ether for the block, and if you are lucky up to 3.75 additional Ether for an...

0 0
0 0

In a couple of large buildings near the Columbia River in Eastern Washington, where hydroelectricity is cheap and plentiful, Dave Carlson oversees what he says is one of the largest Bitcoin mining operations on the planet.

At any given time, Carlson's goal is to account for seven to 10 percent of the entire world's Bitcoin mining as measured by processing or hashing power, he said. At the moment, he's slightly below that target but doesn't expect to remain below it for very long. The operations are fueled by thousands of mining rigs containing more than 1.4 million BitFury mining chips, while Raspberry Pis loaded with custom software direct traffic on each rig."We were looking for the lowest cost, highest volume production, tiny computer controller that had the ability to integrate with another electronic board design. There are many out there, but the Raspberry Pi is something like 40 bucks," Carlson told Ars.

Carlson's company, MegaBigPower, does the biggest portion...

0 0

What is Bitcoin mining? Bitcoin mining is how Bitcoin transactions are validated and confirmed by the Bitcoin network. Bitcoin miners create a new block by solving a proof of work problem that is chained through cryptographic proof to the previous block.

Each block builds upon the previous one creating a blockchain. Every transaction in the blockchain can be proven. In this way, the Bitcoin network can come to distributed consensus as to how many Bitcoins (100,000,000 satoshis) are allocated to each public key address.

What is a Bitcoin miner? A Bitcoin miner is a computer specifically designed to solve problems according to the proof of work algorithm. Currently, highly specialized chips called ASICs, Application Specific Integrated Circuits, are used as Bitcoin miners. There are many places where you can buy a Bitcoin miner.

What is Bitcoin? Bitcoin is an internet protocol that enables the transfer of value over a communications channel like the Internet or...

0 0
0 0

Sixty years of intermittent worry and warnings about the deleterious effects of coffee have had some effect on consumption. Over the last 30 years, Americans have drunk less and less, and over the last ten years, decaffeinated coffee has taken an ever greater share of the market. Doctors treating hypertension routinely recommend that their patients cut down on or cut out coffee. And faced with complaints of sleeplessness or general irritability, doctors immediately ask what role coffee plays in the patient's life-style.

Until very recently, though, the decision about how much coffee to drink was based on common sense and guesswork, not reasoned argument. Even pharmacologists and biochemists had little to support their suspicions that any stimulant as potent as caffeine was likely to have drastic negative effects. Beginning around the mid-80s, enough had been learned about coffee's wide-ranging yet subtle impact on the nervous system to make even the most devoted...

0 0

White Americans, abetted by neo-conservative writers of all hues, generally believe that racial discrimination is a thing of the past and that any racial inequalities that undeniably persist—in wages, family income, access to housing or health care—can be attributed to African Americans' cultural and individual failures. If the experience of most black Americans says otherwise, an explanation has been sorely lacking—or obscured by the passions the issue provokes. At long last offering a cool, clear, and informed perspective on the subject, this book brings together a team of highly respected sociologists, political scientists, economists, criminologists, and legal scholars to scrutinize the logic and evidence behind the widely held belief in a color-blind society—and to provide an alternative explanation for continued racial inequality in the United States.

While not denying the economic advances of black Americans since the 1960s, Whitewashing Race draws on new and...

0 0

As the Earth orbits the Sun, the Moon orbits the Earth, roughly in the same equatorial plane. Thi...

In: AstronomyAnswered: 6 minutes ago

That they changed your world in whatever way they did cause that is usually the most meaningful t...

In: RelationshipsAnswered: 8 minutes ago

The driving distance is about 2025 miles, requiring approximately 29.5 hours, ,mainly along Inter...

In: Driving TimesAnswered: 21 minutes ago

I've had episodes of major depression for almost 50 years. Many hospitalizations and shock treatm...

In: HealthAnswered: 26 minutes ago

It can be either. Horse-drawn carts are virtually all pulled. Library and shopping carts are push...

In: Newtons Laws of MotionAnswered: 28 minutes ago

They were sent to Bergen-Belsen concentration camp. Most of them died there.

In: Germany in WW2Answered: 46 minutes ago No, you would be too far east. Actually, people in Colonial times thought...
0 0
As a versatile musicologist and trenchant social commentator, Nat Hentoff brings uniquely pertinent credentials to his dual tasks in this month's issue - as the author of "We're Happening All Over, Baby!" (on page 82) an insightful anatomizing of America's youthful new generation of anti-establishment social activists, and as interviewer of this month's controversial subject, about whom he writes:

"Less than five years ago, Bob Dylan was scuffling in New York - sleeping in friends' apartments on the Lower East Side and getting very occasional singing work at Gerde's Folk City, an unprepossessing bar for citybillies in the Village. With his leather cap, blue jeans and battered desert boots - his unvarying costume in those days - Dylan looked like an updated, undernourished Huck Finn. And like Huck, he had come out of the Midwest; he would have said 'escaped.' The son of Abraham Zimmerman, an appliance dealer, he was raised in Hibbing, Minnesota, a bleak mining town near the...

0 0