Corba Middleware Protocol Layer Optimization Study

Common Object Request Broker Architecture (CORBA) has been in a wide use in commercial distributed computing environment, for it allows the distributed applications interact, regardless of its OS platform, protocol or language, but CORBA shows a poor performance comparing with the traditional socket protocol under high-load concurrent communication environment, which becomes a bottleneck for CORBA to get a breakthrough in more fields, especially in a performance-sensitive fields.Under a foundation of studying the marshal and demarshal of General Inter Orb Protocol, the transition progress of GIOP message and its affections on network performance, a method of reducing useless information is proposed aiming at the server's marshalling load and network load incurred by the excessive information in GIOP message header package, and a method of letting the client process byte order conversion is proposed aiming at the poor performance of CPU's data processing incurred by immerse byte order conversion.Based on the analysis above, this paper implements a CORBA platform and get the concurrent numbers while bottleneck of the server is arrived on the principle of stress tests. Comparing with the response time and use rate of the CPU while the server is on a high load, it shows an obvious effect in CORBA's performance with the methods above.