Acid (ACID) Base (BASE) Principles for Database Design

Transactions

A transaction is a series of operations performed as a single logical unit of work, either completely or not at all.

Let's take a first look at the state machine model of a transaction.

The picture shows the five phases of a transaction

Transactions must follow ACID principles.

ACID Acid Principle

ACID is a principle that must be followed in order to ensure that data is written reliably during the transaction execution process of a relational database.

Atomicity
The operations of a transaction are either all or none.
Consistency Consistency
The integrity constraints of the database are not violated before and after the transaction begins; however, temporary violations are allowed during execution.
Isolation Isolation
Transactions do not interfere with each other, one transaction cannot see data changes in the middle of another transaction's execution, nor can it interact with another transaction.
Durability
After the transaction ends, the changes will be written to the database and will not be rolled back, even if the database crashes and restarts.
RDBMS In order to achieve high consistency as mentioned in the above four points, there is no emphasis on its scalability.

BASE BASE Principle

Basically Availability
The most basic requirement of a database is availability.

Soft-state
Soft-state can be thought of as an intermediate state between stateless and stateful.
Stateless means that there is no contextual connection between multiple requests, which will help simplify, expand and restore the database.
stateful refers to the connection between multiple request contexts connected.
Soft-state is generally regarded as the server maintains the context within a limited resource (usually time), and when it expires, the state is discarded and returned to the default state.

Eventually Consistency
Allows temporary data inconsistency due to delays, etc., as long as the data is eventually consistent.
Basically Availability to pay attention to.It is probably a problem of translation. The "Basic" here is translated into "basic", and the explanation closer to the original meaning is probably "fundamentally".