System Design Fundamentals

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ACID vs BASE Properties

When we use an application – whether it's online banking or a shopping site – we expect the data to be correct and the system to work reliably. If you transfer money and a glitch happens, you wouldn’t want the bank to deduct money from your account without adding it to the recipient’s account. This is why database consistency and reliability matter so much. A reliable database ensures that even if something goes wrong (like a crash or network issue), your data isn’t lost or corrupted.

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Gerhard Matzen

Gerhard Matzen

· a year ago

The course text say:

In the CAP theorem, a distributed system can only guarantee two out of three: Consistency, Availability, Partition tolerance. 

However, it seems to me that "partition tolerance" is not a choice. Partitions will happen in distributed systems. When they do, you can choose between consistency and availability.