System Architecture and Data Allocation/Coordination Technologies of Autonomous Decentralized Database System for High Assurance
Autor: CARLOS PEREZ LEGUIZAMO
During the last few years there have been important changes in the way that consumers use the Internet and e-commerce. This exceptional expansion, combined with dynamic interactions with users and providers, is boosting the development of new electronic business models, such as block chain, ﬁntech, bitcoin, Uber, Airbnb, etc. The information systems that support such business processes, usually depend on distributed database systems. These approaches have mostly opted to exploit two important characteristics of this kind of applications: ﬁrst, they involve a set of commodity types with a limited inventory. Second, the operations of interest on these items typically involve incremental updates. It is, therefore, possible to achieve distribution by using tokens to represent the instances of commodities for sales in e-business. There are two fundamentally diﬀerent approaches for distributing tokens: replication and partitioning. Token replication requires expensive distributed synchronization protocols to provide data consistency. On the other hand, token partitioning, relies on token redistribution techniques that allow dynamic migration of tokens to the servers where they are needed. Such strategies are developed from the standpoint that the total system can locally be known, and therefore, they fail to address the important problem of how to allocate and coordinate the data to make it adaptive to rapidly changing situations. We present Autonomous Decentralized Database System (ADDS) concept and architecture in order to extend the properties of autonomy and decentralization to wide-area distributed database systems. ADDS fundamental technologies confers autonomy and loosely coupling to all the components of the system (databases) and provides a background coordination to adapt the system to evolving situations. Moreover, we present two data allocation and coordination technologies for high response time based on speciﬁc situations. Finally, in order to show the eﬀectiveness of our proposal we compare it with conventional partitioning strategies.