Exploring ACID properties
ACID stands for atomicity, consistency, isolation, and durability. In the following sections, we will explain what each of these means for our database design and architecture.
Atomicity
Atomicity refers to the concept that a transaction needs to follow the binary success or fail principle. If a transaction succeeds, then its results are visible to every subsequent user. If a transaction fails, then every change is rolled back to the point it was right before it started. Either all actions in a transaction occur or none at all.
A simple example to understand atomicity is by transferring money from account A to account B. Money needs to be credited from account A and then debited into account B. If the operation fails midway, then both accounts A and B need to be reverted to their state before the operation started.
In MongoDB, operations in a single document are always atomic even if the operation spans multiple subdocuments or arrays within...
