Passing the ACID Test
The best way to describe how transactions must be supported by an application is to look at the criteria a transaction must satisfy to be valid. The four major characteristics of a transaction are that it must be atomic, consistent, isolated, and durable. These characteristics are commonly referred to using the mnemonic ACID. If an application’s processing of a set of operations can’t pass the ACID test, the operations aren’t truly being performed as a transaction.
Atomic
The operations within a transaction must be treated as a single, atomic unit. This means that a transaction can only be considered complete and allowed to commit if every operation within it is performed successfully. If a failure occurs at any point, ...
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