This paper describes the design and implementation of a fault-tolerant CORBA naming service-CosNaming FT. Every CORBA object is accessed through its Interoperable Object Reference (IOR), which is registered with the CORBA name service. The name service therefore is a critical gateway to all objects in a distributed system; to avoid having a single point of failure, the name service should be made fault-tolerant. CosNamingFT uses the GroupPac package, a CORBA-compliant suite of protocols, to replicate the name server. GroupPac services are built from Common Object Services that function as building blocks to implement fault-tolerant applications. This paper aims to demonstrate the usefulness of some of these object services and to demonstrate the importance of open solutions issues in replicating distributed objects.
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