Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up.
Sign up to join this community
I am wondering why we need Mempool (central and aggregated pool) while each miner has its own pool?
If we need the Mempool as an architectural design, how we can make sure that miners are sending their transactions to Mempool?
Is that possible for a miner to confirm a transaction on its own(Privately) but not send it to the Mempool(Shared-Public Pool?
Please correct me if my understanding from Miner pool as a private and the Mempool as a public area is not correct.
Thank you
The mempool is not a central or shared pool, every node has its own separate mempool (though a node does not have to keep a mempool, it will still function fine without one).
Addendum
Solo miners do not now share mempools and never have. A solo miner can mine without any specific communication or coordination with other miners. Obviously nowadays a solo miner needs an enormous amount of hashpower to have any prospect of profit.
There is nothing in the original and current core network protocols for Bitcoin that explicitly coordinates, synchronises or shares mempools. It is likely, particularly when the network is less busy that all nodes have mostly the same set of transactions in their mempool. This is simply because the time for data to diffuse across the network is typically much less than the block interval.
Nowadays, because of the huge increase in mining and the consequent huge increase in mining target difficulty (to keep block interval roughly constant) - Mining has become very expensive and so most miners pool resources rather than mine separately.
Miners who are members of mining pools exchange information using one of several completely separate network protocols (e.g. Stratum) that are different and separate from the core network protocols of Bitcoin. I don't know these mining pool protocols or whether block templates are centrally chosen or selected in some egalitarian distributed method but, in principle, I don't see it is essential for them to share or synchronise mempools either.
There is only one mempool. This is where all of the transactions waiting for verification sit. Mining pool nodes take the transactions with the highest fees to fill newly discovered blocks. Mining pools may crop their version of the mempool to their desire to better allocate work to the miners.
Mining pools are 'pooled' hash rate.
