What is distributed system explain?

Introduction 

A distributed system is a group of computers that are not interconnected and do not share the same memory. The processes executing on these systems communicate with each other by sending messages to each other over a communication channel. Messages are sent after a transmission delay. A distributed system appears to the user as a centralized operating system for a single machine, but it runs on multiple independent computers. Only one copy of the operating system can run on each computer. Transparency is an important concept. (Transparency refers to accessing resources or services without knowing where they are installed in the system.)

Distributed operating systems Shared memory computers in which communication networks ( Expands the concept of source management and user-friendly interfaces for multiple computers connected by communication network.

Distributed file systems provide a new way to access files and directories. To implement this, we do not need to implement new ways of storing files. Instead we use the existing file managers to store the files.

Distributed System

Distributed systems facilitate the sharing of resources and information over a computer network. An important design issue that makes these systems attractive is that all aspects of the description are transparent to the user. It is unfortunate that there is no commonly used wide area distributed system that allows users to transparently share and organize free resources. Two fundamental concepts influence our thinking and design for new computing and information systems. The first is that every type of information technology has included many products, such as hardware and software that are becoming faster, cheaper and better. The second is the growing acceptance of a network-centric paradigm, in which distributed applications (Machine Distributed Applications) meet a range of quality of service (QOS) requirements by putting together the parts connected by different forms of communication services. is constructed. 

According to Tanenvom "a distributed system is a collection of independent computers that appear to its users as a single system". According to Berissimo and And rogues, “A distributed system is one in which your work is not affected if the machine fails. 

Distributed computing is a method of computer process in which different parts of a program run at the same time on two or more computers that are connected by a network. 

Computer Network v/s Partitioned System

Computer Network - It is a collection of separate computers that are interconnected and exchange information among themselves based on special protocols. All these computers are identified by their IP address. 

Partitioned System - Multiple computers on a network working together as a D system. The separation and communication between computers are hidden from the user.

Characteristics of Distributed Systems 

1. Concurrency - 

Concurrent execution computers in a network is a type of norm. Adding resources to a distributed system can provide greater power to the entire system.

2. No global clock -

When programs need to be corporate, they keep their tasks in the same order by exchanging messages directly but they quickly turn out. There is a limit to the accuracy with which a network can synchronize its clock. Computers can keep clock sync with each other only up to a limit.

3. Independent Failure -

Any component of the network can fail and the software handles it.

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