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.
An example to consider.
A saved reading position must belong to a particular reader or device. Deciding that ownership explains where the information should live and when it should change.
Put it in perspective.
Ask what a future operator would need during an interruption. A useful description connects the symptom, the affected work, and the next safe action.
Follow a related question
Inspect the source and measurement method.
An outlier is a question firstName the activity the tool should improve.
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Related background to continue exploring this subject.
Cloudflare: managing application state Cloudflare: application bindings
