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Preface

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Overview of Distributed Systems Course

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Preface

  1. 1. DISTRIBUTED SYSTEMS B. Tech IV/IV, II Semester COMPUTER SCIENCE & ENGINEERING 2/6/2017 © Copyright Material 1
  2. 2. Course Organization 2/6/2017 © Copyright Material 2 Distributed Systems Foundation Middleware Distributed Algorithms Characterization of Distributed Systems System Models Distributed Objects Remote Invocation Time & Global States Coordination & Agreement Operating System Inter Process Communication Shared Data Transactions & Concurrency Control Distributed Transactions Replication
  3. 3. Course Objectives • Characteristics of distributed systems and the prominent architectural features of these systems. • Describe the features and applications of important standard protocols which are used in distributed systems. • Characterize different implementation paradigms for distributed systems. • Explain the working of a distributed algorithm. • Perform simple proofs of system properties, given a formalized description of a system. • Select an appropriate distributed algorithm to satisfy given design requirements for a distributed system. • Select an appropriate implementation paradigm to satisfy given design requirements for a distributed system. • Develop an implementation of a distributed system from a formal or informal description of its function and purpose. 2/6/2017 © Copyright Material 3
  4. 4. Preface UNIT I : Introduction This Chapter explains  Evolution and the need for a Distributed System  Several examples of modern distributed applications  Underlying trends driving distributed systems today  Need for resource sharing & how Distributed systems helps  Challenges arising from the construction of distributed systems 2/6/2017 © Copyright Material 4
  5. 5. Preface UNIT II: System Models To construct a Distributed System….. A system model provides an explanation of the important and complementary ways in which the design of distributed systems can usefully be described and discussed Types of Models  Physical Model  Architectural Model  Architectural elements  Architectural Patterns  Middleware solutions  Fundamental Model  Interaction Model  Failure Model  Security Model 2/6/2017 © Copyright Material 5
  6. 6. Preface UNIT III: Interprocess Communication  API For Internet Protocols: TCP & UDP  Socket is an end point for communication  TCP & UDP Sockets classes provided in Java  External Data Representation: An agreed standard for the representation of data structures and primitive values 2/6/2017 © Copyright Material 6 Applications Request-Reply Protocol Marshalling & External Data Representation UDP and TCP RPC, Distributed Objects & RMI UnitIII Middleware Layers
  7. 7. Preface UNIT IV: Distributed Objects & RMI RPC: Remote Procedure Call is the initial way of establishing remote invocation Distributed Objects: These are objects managed by servers and their clients invoke their methods using remote method invocation RMI: Remote Method Invocation is one of a means to create Distributed Object Model 2/6/2017 © Copyright Material 7 Applications Request-Reply Protocol Marshalling & External Data Representation UDP and TCP RPC, Distributed Objects & RMI UnitIV Middleware Layers
  8. 8. Preface UNIT V: Operating System This Chapter explains  The role of Operating System to govern Hardware & Middleware System Layers  Core OS Functionalities  How processes are created  Address Space for a process  How Thread improve Performance  Thread Programming 2/6/2017 © Copyright Material 8 Applications, services Computer & Platform Middleware OS: kernel, libraries & servers network hardware OS1 Computer & network hardware Node 1 Node 2 Processes, threads, communication, ... OS2 Processes, threads, communication, ...
  9. 9. Preface UNIT VI: Distributed File System This Chapter explains  The architecture and implementation of a basic distributed file systems  The basic characteristics of a File System  The requirements for building a DFS  The architecture of a Distributed File System  Case Studies – Network File System & Andrew File System  The characteristics of Information storage and retrieval service – Napster  Design of Peer-to-peer middleware systems  Routing overlays for locating Distributed nodes & globally scalable objects. 2/6/2017 © Copyright Material 9
  10. 10. Preface UNIT VII: Coordination & Agreement This Chapter explains  How processes coordinate their actions and agree on shared values in distributed systems  Algorithms to achieve mutual exclusion among a collection of processes  How a group of processes can agree on a new coordinator in case of failure  The related problems of group communication.  Types of Multicast approaches  Algorithms to achieve Multicast communication 2/6/2017 © Copyright Material 10
  11. 11. Preface UNIT VIII: Transactions & Replication This Chapter explains  3 ways of concurrency control in distributed transactions – Locking, Timestamp Ordering, Optimistic concurrency control  How to detect a Distributed Deadlock – Edge Chasing, Transaction priorities  How to recover Transactions – Logging, Shadow Versions  What is Replication & the necessity for it?  Architectural model for performing replication  How to achieve fault tolerant techniques – Passive & Active Replication 2/6/2017 © Copyright Material 11
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