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Available courses

DISTRIBUTED SYSTEMS

A distributed system is simply any environment where multiple computers or devices are working on a variety of tasks and components, all spread across a network. Components within distributed systems split up the work, coordinating efforts to complete a given job more efficiently than if only a single device ran it.

Objectives:
 To learn the principles, architectures, algorithms and programming models used in
distributed systems.
 To examine state-of-the-art distributed systems, such as Google File System.
 To design and implement sample distributed systems.

DISTRIBUTED SYSTEM

UNIT I
Characterization of Distributed Systems: Introduction, Examples of Distributed systems,
Resource sharing and web, challenges.
System Models: Introduction, Architectural and Fundamental models.
UNIT II
Time and Global States: Introduction, Clocks, Events and Process states, Synchronizing
physical clocks, Logical time and Logical clocks, Global states, Distributed Debugging.
Coordination and Agreement: Introduction, Distributed mutual exclusion, Elections, Multicast
Communication, Consensus and Related problems.
UNIT III
Inter Process Communication: Introduction, The API for the internet protocols, External Data
Representation and Marshalling, Client-Server Communication, Group Communication, Case
Study: IPC in UNIX.
Distributed Objects and Remote Invocation: Introduction, Communication between
Distributed Objects, Remote Procedure Call, Events and Notifications, Case study-Java RMI.
UNIT IV
Distributed File Systems: Introduction, File service Architecture, Case Study1: Sun Network
File System, Case Study 2: The Andrew File System.
Name Services: Introduction, Name Services and the Domain Name System, Directory
Services, Case study of the Global Name Service.
Distributed Shared Memory: Introduction Design and Implementation issues, Sequential
consistency and Ivy case study, Release consistency and Munin case study, other consistency
models.
UNIT V
Transactions and Concurrency Control: Introduction, Transactions, Nested Transactions,
Locks, Optimistic concurrency control, Timestamp ordering, Comparison of methods for
concurrency control.
Distributed Transactions: Introduction, Flat and Nested Distributed Transactions, Atomic
commit protocols, Concurrency control in distributed transactions, Distributed deadlocks,
Transaction recovery