According to the changes in the amount of backup data, the types of backup can be divided into:

The classification of backup types based on the amount of data processed is a fundamental concept in data protection. A full backup copies the entire selected dataset. An incremental backup copies only the data that has changed since the most recent backup of any type (full or incremental). A differential backup copies all data that has changed since the last full backup. These three methods are directly defined by the volume of data they handle in relation to a previous backup state.

A. Real-time backup, or Continuous Data Protection (CDP), is a classification based on the backup schedule or timing (i.e., continuous capture of changes), not the amount of data backed up.

1. Huawei HCIA-Storage V5.0 Training Material. Chapter 4: "Backup and Disaster Recovery Technology and Application

" Section 4.2.1 "Backup Modes." This section explicitly defines and differentiates backup types: "Common backup types include full backup

incremental backup

and differential backup." It details that a full backup copies all data

an incremental backup copies data changed since the last backup

and a differential backup copies data changed since the last full backup.

2. Patterson

D. A.

& Hennessy

J. L. (2017). Computer Organization and Design: The Hardware/Software Interface (5th ed.). Morgan Kaufmann. In discussions on I/O and dependability (Chapter 6)

the concepts of full

incremental

and differential backups are presented as standard strategies for data protection

with their definitions revolving around the quantity of data copied relative to a baseline.

3. Silberschatz

A.

Korth

H. F.

& Sudarshan

S. (2020). Database System Concepts (7th ed.). McGraw-Hill. Chapter 16

"Recovery System

" discusses backup strategies. The text explains that full backups copy the entire database

while incremental backups copy only the changes

directly aligning with the classification based on data volume.