Interface StorageDiagnosticsRecord

Cumulative counters for one (source alias, operation) pair (M98m).

Every settled service operation increments count and exactly one of succeeded (fulfilled) or failed (rejected, or threw synchronously); count is the saturating sum of the two. lastDurationMs is the integer duration, on the runtime's monotonic clock, of the most recently settled call, and is null for getSignedUrl, which records outcome and age only. lastBytes is a number only after a SUCCESSFUL put (the application's argument) or get (the application's result); a zero length is a real zero. It is null after a failure and for every other operation — including getStream, even when it takes the buffered fallback. ageMs is the elapsed time since the most recent settled call. Age, duration and bytes describe the same last settlement. Paths, bytes, metadata, signed URLs and errors are never carried.