Distributed Information Systems Quiz

Distributed Information Systems:

• Goal is to distribute information across several servers
• Many distributed systems today are traditional information systems integrating legacy systems
• Transactions form an atomic operation where all READ and WRITE operations are executed
• Transactions combine a set of related operations into a unit that either completely succeeds or completely fails
• Transaction Processing Monitors coordinate the execution of a transaction involving distributed data
• Facilities for direct communication between applications, such as Remote Procedure Call (RPC) and Message-Oriented Middleware (MOM), are needed for multiple clients
• Pervasive (ubiquitous) computing involves microprocessors embedded in everyday objects
• Emerging research topics include distributed systems in which instability is the default behavior, and pervasive systems with small, battery-powered, mobile devices that lack human administrative control
• Pervasive applications require devices to continuously be aware of contextual changes and encourage ad-hoc composition and sharing as the default
• Examples of pervasive systems include home systems, electronic health systems, and sensor networks
• Sensor networks are networks where nodes have the special capability of sensing parameters such as light intensity, temperature, pressure, and velocity
• Sensor networks have many nodes, are simple, often battery-powered, and can be considered from a database perspective as distributed systems.