Simple definition
A method where the last complete state is maintained directly in the full file.
Technical definition
Each new increment is injected into the current full while the old versions are kept as rollback files.
What is it used for ?
Quickly re-establish the last point.
Practical example
The last backup is immediately available as full, the older dots being rebuilt with the reverses.
Common issues
- Many writings about the « Free «
- Disc-sensitive chain
- Less used in some modern products
Related terms
Incremental Forever
Key takeaway: Exact behavior and commands may vary depending on versions, products and architectures.