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Information about peers is stored in a Kademlia-like Distributed Hash Table in my node. Where is it stored? I know that admin.peers command gives me a list of nodes but I want to see the actual structure of the table with all the information about peers. Is this possible?

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These are stored in the the ~/.ethereum/nodes/ directory as a LevelDB database (in .ldb files). The reading and writing of these files is handeled by database.go.

To read them you'd need a tool which understood the schema on which the database is based, which is described here. I don't know of any existing tool for the node data, but block explorers work in an equivalent way by reading and parsing the chaindata .ldb files (I believe).

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