A calculation that uses only its current input is different from a service that remembers earlier work. Once information must survive the request, questions about storage, ownership, and recovery become part of the design.
Some state is essential, such as a document someone is editing. Other state is a temporary convenience, such as a cached result. Treating both as equally permanent makes the system harder to explain and harder to restore.
List what the application remembers and why. For each item, ask who can change it, how long it should remain, and what happens if it is missing. A clear inventory gives persistence a purpose instead of allowing it to accumulate by accident.
- List the information that must persist.
- Separate essential data from temporary convenience.
- Define ownership and recovery.
Picture this situation.
Consider a draft that can be edited from two places. The application needs an understandable rule for deciding which version represents the current work.
A second way to look.
Describe one normal day and one awkward day. The difference between them can show which decisions belong in the design and which can remain simple.
Follow a related question
Match precision to the reader’s task.
Rounding without losing the pointChoose a representative sample.
How tools learn to work togetherKeep learning
Related background to continue exploring this subject.
Cloudflare: managing application state Cloudflare: application bindings