Exchanges and pools wallet management

[lx]

Hi community
There is something I have a hard time to understand.. how does the pools and exchange platforms (and even sites like coinbase or blockchain) manage to have several bitcoin addresses for their customers ? I can't believe it's just one instance of bitcoind and a database management of assets per users ?

Thanks

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[instoftech]

It shouldn't matter even if all addresses come from the same bitcoind instance.
For the customers, they are not granted administrative access (i.e., private key) to the actual bitcoin wallet anyway.

In such systems, the server only needs to keep track of the assignment of addresses to different users, and the incoming and outgoing transactions of them (for deducing the users' balances). These can all be done using the database.

<I'm not an insider. This is just what I'll do if I implement such services.>