Research On The Data Restoration Technology Of Distributed Database System

With the need for the Computer Application and Computer Hardware expanding more and more widely, especially with the Network Technology more and more mature , the distributed database system is developing swiftly. The distributed system generally consists of several parts as follows: the user interface sub-system, the catalog management sub-system, the compiling sub-system, the distributed transaction management and cocurrent control sub-system, the data execution sub-system, the communication sub-system, the restoration system and the database. Among these parts, the realization of the restoration sub-system is a very complicated process. Meanwhile, it is also a very important and necessary part of the distributed database system. In order to prevent any possible fault, the distributed database system must provide the corresponding restoration measures to change the state of the data from faulty to normal automatically to continue the normal service of the database.Based on the deep-going exploration of the distributed data system, the backup and the log-file technology, this article puts forwards a data restoration method on the basis of two-phase commit protocol. This method can basically realize the distributed transaction execution without any block. Besides the correct realization of the distributed database restoration, this method guarantees the high usability of the distributed database system.