Atomicity and Isolable

[Benson Fung]

Hello,
ACID means Atomicity, Consistency, Isolable and Durability.
In this case, what is the difference between Atomicity and Isolable?
It seems quite similar.

Thanks
Benson

[Benson Fung]

Sorry, it should be Isolatable.
Benson

[Andrew Monkhouse]

Hi Benson,
Atomic means that the entire operation should either succeed or fail. You cannot have part of an atomic operation succeed while another part fails.
Isolation deals with how each transaction affects and is affected by other transactions that are occuring. This is where we set the isolation levels on transactions to prevent or allow: dirty reads, non-repeatable reads, and phantom reads.
Regards, Andrew

[Benson Fung]

Hi! Andrews,
In fact, I also want to ask how to define Durability.

Thanks
Benson

[daniel guo]

Durable means the transactional system must ensure that the data is persistent before the transaction can be considered to be complete.