Runtime connection load balancing of work across connections to a clustered computing system involves the routing of requests for a service, based on the current operational performance of each of the instances that offer the service. The distance between the first and the third recording layer is a maximum of 72 \u03bcm. The temperature regular can also be used to regulate the temperature of some circuits, e. Output ports and fabric routes are selected to maintain order within a flow by routing the flow along a single fabric route to a single output trunk. The interface layer may include at least one SiCH layer and at least one SiOCH layer.