StartTime time.Time   `msg:"startTs"` // Time at which rebalance-start was issued
	EndTime   time.Time   `msg:"stopTs"`  // Time at which rebalance operation completed or rebalance-stop was called
	Status    rebalStatus `msg:"status"`  // Current state of rebalance operation. One of Started|Stopped|Completed|Failed.
}

// rebalanceMeta contains information pertaining to an ongoing rebalance operation.
type rebalanceMeta struct {

	// limit (8KB), we stop growing the source string once the limit
	// is reached and keep reusing the same source string - that
	// should therefore be always resident in the L1 cache - until we
	// have completed the construction of the result.
	// This yields significant speedups (up to +100%) in cases where
	// the result length is large (roughly, over L2 cache size).
	const chunkLimit = 8 * 1024
	chunkMax := n

			s3LogIf(ctx, fmt.Errorf("Unable to restore transitioned bucket/object %s/%s: %w", bucket, object, err))
			return
		}

		// Notify object restore completed via a POST request.
		sendEvent(eventArgs{
			EventName:  event.ObjectRestoreCompleted,
			BucketName: bucket,
			Object:     objInfo,
			ReqParams:  extractReqParams(r),
			UserAgent:  r.UserAgent(),