Principles for optimizing CORBA internet inter-ORB protocol performance

摘要

The Internet Inter-ORB Protocol (IIOP) enables heterogeneous CORBA-compliant Object Request Broders (ORBs) to interoperate over TCP/IP networks.The IIOP uses the Common Data Representation (CDR) transfer syntax to map OMG Interface Definition Language (IDL) data types into a portable network format.Due to the excessive marshaling/demarshaling overhead,data copying,and highlevels of function call overhead,some implementations of IIOP protocols have yielded relatively poor performance over high-speed networks.To meet the demands of emerging distributed multimedia applications,however,CORBA compliant ORBs must support interoperable and highly efficient IIOP implementations.