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A mining pool is a way of sharing the work needed to find a block. Miners are rewarded in proportion to the amount of computing power they contribute to the problem, with various ways of calculating returns. Use this tag when specifically asking about operating a mining pool or about pooled mining but not other forms of mining.

3 votes

Active workers vs Active users

worker is analogous to the number of connections. username is just a way of identifying specific miners in the list of connections and to which account on the pool they belong to. They don't have an …
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3 votes
Accepted

What would happen when transaction and orphan pools is full?

Those paying the lowest feerate are dropped, working similarly to the transaction selection logic for blocks which prioritizes transactions that have the highest feerate.
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1 vote

Does the low difficulty for my pool give my miners more guesses per block?

The "difficulty" being given to miners by a pool is used for tracking if the miner is doing useful work that could possibly result in a block, paying out the miner accordingly. The number of attempts …
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2 votes
Accepted

Slush's Pool Worker Offline?

A GPU miner does not have sufficient speed to satisfy the minimum difficulty requirements of pooled mining today (which is why it shows as offline). GPUs have been completely obsoleted since 2013, thi …
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1 vote
Accepted

Do pool servers check for duplicate shares?

Yes, it is absolutely done. A well known exploit in early stratum mining pools was that they used string comparison when looking up duplicate submissions, where nonce aaaaaaaa and Aaaaaaaa are identic …
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4 votes

who is the "owner" of a newly mined BTC before its first transaction?

The amount for the block reward is what is created, there is no additional created for any reason. If the block reward is 6.25 BTC, that is exactly what the miner is paid, and nobody else.
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2 votes

Bitcoin pool with GETWORK support

GetWork requires you to make a new request every 2**32 nonces, modern miners would be making 50,000+ requests a second. No pools have supported this since 2011.
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0 votes

BTC/hashes/second rates for various pools

Yes, all forms of mining including solo have the same effective output (though some with more variance than others). Some pools charge fees however.
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1 vote
Accepted

How does the getblocktemplate request rate correlate with a miner's hashrate?

There's no relationship. With a single block template mining software can create a limitless amount of work by modifying the extranonce, the only reason they would need to update to a new one is to in …
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2 votes
Accepted

FPGA mining setup with Altera DE2-115

Essentially no software supports the getwork call anymore due to the speed of modern miners (they would call it 25,000+ times a second). You’ll need to use a very old version of Bitcoin Core from befo …
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0 votes

How do miners send blocks to network peers?

Neither, it's a binary format on the wire. The 'hex' format is the same as the binary format, it just takes 2x the space.
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1 vote

Solo mining: Stratum from pool 0 detected new block at height

"Stratum from pool 0 detected new block at height" The first stratum server you are connected to updated its work to match the state of the rest of the network. That is, someone else found a block a …
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3 votes
Accepted

What hardware do pool operators use for calculating the hashmerkleroot?

They don't have any special hardware, as pools don't meaningfully produce merkle roots in any volume. Since the original answer in 2013 which pertained to GetWork, mining has moved entirely to using t …
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6 votes
Accepted

How do mining pools ensure pool members don't cheat?

The work given by a pool includes the coinbase transaction which defines the payment as going to the pool, and is unique to that. If the client modifies the payout address, the proof of work they have …
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5 votes
Accepted

How bitcoin miners choose timestamp in block header when mining?

My original understanding of mining is to pick a timestamp (the timestamp of when miners started mining) and then fix it. There's no reason for that to be the case, as mining is progress-free. It is …
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