Sparbuch is the German word for a savings account. The idea behind the name is as follows:
A credit institute doesn't store your current balance, but keeps a list of deposits and payouts, which can be used to recalculate the current balance (or any balance from the past).
In the same way, an event store does not store the current state, but keeps a list of events, which can be used to recalculate the current state (or any state from the past).
A credit institute doesn't store your current balance, but keeps a list of deposits and payouts, which can be used to recalculate the current balance (or any balance from the past).
In the same way, an event store does not store the current state, but keeps a list of events, which can be used to recalculate the current state (or any state from the past).