問題文
A team is deciding what to send as dimensions and what to add later as metadata. Which statement correctly describes the constraint that drives this decision?
選択肢
- Dimensions can be renamed after ingest without affecting identity; the team may pick short keys now and expand them into clearer names later.
- All three kinds can be added at any time, so the decision has no lasting consequence and the team can defer it until a filter is actually wanted on a chart or in a detector.
- Dimensions must be sent with the data points at ingest and cannot be added to an object afterwards, so anything needed for identity must be decided before the data starts flowing, while properties and tags can be added or changed later.
- Only tags can be added after ingest, and both dimensions and custom properties are fixed at ingest time, so the team should encode everything they might ever need to filter on into the dimensions from the start.