Application of a Lump-sum Update Method to Distributed Database

At the present time, with spread of the internet business, many business systems have become to be built as distributed systems. Accordingly, the database is also dis- persed to plural business systems as the distributed database. By the way, in the actual business systems, a lump-sum up- date of a great deal of data has often to be performed con- currently with the online transactions. However, in this case, there is a problem of efficiency in the conventional update methods, which update databases by the chain of many di- vided transactions. For this problem, we have shown the ef- ficient lump-sum update method for centralized business sys- tems, which use the transaction time. However, as shown by the distributed transactions, some transaction features for the distributed database are different from the centralized database. Therefore, in this paper, first we show the problems on apply- ing this method to the distributed databases. Secondly, we propose their measures. Moreover, through the evaluations using a prototype, we confirmed that our measures are valid and this method can be applied to the distributed databases.