SAP PI distributed architecture contains one instance of central adapter engine with ESR and ID components and multiple instances of non central adapter engines. Non central adapter engines do not contain repository. The repository objects are distrubuted from central instance in runtime cache to non central instances.
as non central instances are near to the business systems, the active communication channels in each instance should be very specific to the instance. The runtime cache of all ID objects repository should not be propagated to each non central instance.
what is the best practice to maintain instance specific communication channels in runtime in SAP PI/PO distributed architecture?