A Fault-Tolerant Object Service on CORBA

• Main Authors: Sheu, Guang-Way, 許光慰
• Other Authors: Yuan Shyan-Ming
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/96415643951765474515

碩士 === 國立交通大學 === 資訊科學學系 === 84 === With the development of distributed systems and object- oriented technology, object-based distributed processing has been highly valued. Therefore, OMG (Object Management Group) is devoting itself to the standardization of distri-buted object exchange, and CORBA (Common Object Request Broker Architecture) is exactly its first standard for distributed object exchange. There are more and more COSS (Common Object Service Specification) on CORBA,but no common specification about fault- tolerance exists now. Since classes of large-scale distributed applications will have to deal with unpredictable communication delays, with partial failures, and with networks partitioning, there have been many reseraches for fault-tolerance on CORBA environment such as ELECTRA, Orbix+ISIS, etc. We propose a "warm stand-by" replication approach in this thesis. When an object (the primary object) is invoked, it will invoke a secondary object, andthe primary object will log the messages and checkpoint the state to the se- condary object periodically. If the primary object fails, the secondary can take over automatically. We provide a library according to the style of COSS.With such an interface, programmers can write programs with fault-tolerance a-bility. The whole model has been implemented on Orbix, which is a full imple-mentation of CORBA specification.