Distributed Systems Course Overview
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Questions and Answers

Can you name some examples of operating systems?

Linux, Windows, Unix, FreeBSD, macOS, Aegis, Scout, Hydra, Mach, SPIN, OS/2, iOS

What is an operating system?

A user interface to hardware that manages resources and provides communication.

Can you name some examples of distributed systems?

Client-Server, The Web, The Internet, DNS, Gnutella, Amazon EC2, Google datacenter

How does Leslie Lamport define a distributed system?

<p>A distributed system is one where the failure of a computer you didn't even know existed can render your own computer unusable.</p> Signup and view all the answers

What is the FOLDOC definition of an operating system?

<p>The low-level software that handles interface to hardware, schedules tasks, allocates storage, and presents a default interface to the user.</p> Signup and view all the answers

What is a distributed system according to Andrew Tanenbaum?

<p>A collection of independent computers that appear to the users of the system as a single computer.</p> Signup and view all the answers

According to Michael Schroeder, what are the three primary characteristics of a distributed system?

<p>Multiple computers, interconnections, and shared state.</p> Signup and view all the answers

Study Notes

What This Course is About

  • This course is about distributed systems.
  • It will teach you how to design and build distributed systems.
  • It will explore how these systems work in real-world applications.

Distributed Systems

  • Distributed Systems is a collection of independent computers that appear to the users as a single computer.
  • It involves multiple computers, interconnections, and shared state.

Operating Systems

  • Operating systems provide a user interface to hardware.
  • It also provides abstractions, like processes and file systems.
  • Operating systems are resource managers, often using schedulers.
  • Operating systems facilitate communication through networking.

Examples of Distributed Systems

  • Client-Server (NFS)
  • The Web
  • The internet
  • A wireless network
  • DNS
  • Gnutella or BitTorrent (peer to peer overlays)
  • A “cloud”, e.g., Amazon EC2/S3, Microsoft Azure
  • A datacenter, e.g., NCSA, a Google datacenter, AWS

Leslie Lamport's Definition

  • Leslie Lamport's definition of a distributed system: "A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable."

FOLDOC Definition

  • FOLDOC's definition of a distributed system: "A collection of (probably heterogeneous) automata whose distribution is transparent to the user so that the system appears as one local machine."
  • Distributed systems typically use a client-server organization.

Textbook Definitions

  • Andrew Tanenbaum's definition of a distributed system: "A distributed system is a collection of independent computers that appear to the users of the system as a single computer.”
  • Michael Schroeder's definition of a distributed system: "A distributed system is several computers doing something together."

Incompleteness of Definitions

  • Textbook definitions are often perceived as inadequate because they lack real-world context and practical implications.

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Related Documents

L1-12_CS425.pdf

Description

This quiz covers the foundational concepts of distributed systems, focusing on their design, functionality, and real-world applications. You'll learn about the principles that allow independent computers to operate as a cohesive unit. Topics include client-server models, cloud services, and operating system interactions.

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