This paper proposes a real-time query method for distributed database requirement information. First, we propose to extract the information according submitted keyword. Then, establish model of demand and classification model, using multivariate hash algorithm When there is keyword, proposed directly reads data above ring based on keyword improve efficiency. Extensive experimental results indic...

The changes in the distributed database environment during its lifetime necessitate a redesign of the distributed databases so as to keep the performance of the applications/transactions from degrading. Till now most of the work in distributed database design dealt with developing better fragmentation and allocation algorithms. This paper introduces an hitherto unexplored step in distributed da...

ÐAn important characteristic of distributed object management systems is that due to network or machine failure, the environment may become partitioned into subenvironments that cannot communicate with each other. In some application scenarios, it is important that the subenvironments remain operable even in this case. In particular, queries should be processed in an appropriate way. To this en...