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When one deploys a smart contract onto the Ethereum blockchain, is the smart contract deployed on all nodes or just a few nodes? In short. where is the specified location that the smart contract is deployed?
The context of this question is to understand the resiliency of a smart contract in the event the node that contains the smart contract fails.
The contract is (delivered as) transaction data (the payload) which is known to all full nodes.
Contracts are part of the blockchain "state" which is a logical arrangement of data agreed on by all nodes. It might help to think of the "state" as something ethereal, like the "facts" ... quite independent from storage details but easily represented in documents.
The official "state" is whatever a majority of nodes say it is. So, yes. Many thousands of copies of the bytecode for the contract and the contract's internal state. It's quite resilient.
Hope it helps.
