Blockchain & Cryptocurrency Glossary

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Mining Pool

1 min read
Pronunciation
[mīn-ing pül]
Analogy
Think of a mining pool as a lottery syndicate: individuals pool their tickets (hash power) to increase their chance of winning, then split the prize based on how many tickets each person contributed.
Definition
A collective of miners who combine their computational resources to improve the probability of finding a block and share the rewards proportionally to contributed work.
Key Points Intro
Mining pools coordinate individual miners through these mechanisms:
Key Points

Shared hash power: Aggregates computational resources to solve blocks faster.

Proportional rewards: Distributes block rewards based on each miner’s contributed shares.

Fee structure: Pool operator typically charges a small percentage of rewards.

Payout schemes: Common methods include PPS, PPLNS, and proportional.

Example
A solo miner with 100 MH/s joins a pool with total 10 GH/s. When the pool finds a block, the miner receives 1% of the reward, reflecting their 1% contribution of hash power.
Technical Deep Dive
Miners submit “shares”—partial proofs of work meeting a lower difficulty—to the pool server as proof of effort. The pool aggregates shares, constructs full block candidate templates, and dispatches them to miners. When a valid block is found, the pool broadcasts it, collects the 12.5 BTC reward, deducts fees, and issues payouts via on‑chain transactions.
Security Warning
Trusting a pool operator introduces centralization risk; a malicious operator could withhold blocks or refuse payouts—choose pools with transparent, on‑chain payout records.
Caveat
Large pools can approach 51% of network hash rate, risking centralization; diversifying across pools mitigates this.

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