Comprehensive Report on Distributed Systems: Features and Objectives

This report provides a comprehensive overview of distributed systems, defining them as systems comprised of autonomous computers connected via distribution middleware to share resources and capabilities. It highlights the key features of distributed systems, including concurrency, autonomy, better price-performance ratio, and fault tolerance, while also noting the potential for variations in computer function and size. The report details the major objectives of distributed systems, such as transparency, reliability, performance, and scalability. It contrasts distributed systems with parallel systems, emphasizing differences in database administration and transaction handling. The advantages of distributed systems are explored, including data sharing, autonomy, globalized databases, availability, better performance, resource scalability, and malfunction recovery. The report also addresses the disadvantages, such as high software development costs, potential for bugs, increased processing overhead, security vulnerabilities, message loss, and overloading. Finally, it provides examples of distributed systems like Windows Server and Linux (Apache Server). Desklib offers more resources, including past papers and solved assignments for students.

Distributed System
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 Introduction
 Key Features of Distributed System
 Major Objectives of Distributed System
 Advantages of Distributed System
 Disadvantages of Distributed System
 Examples of Distributed System
 Conclusion
 References
Table of Contents

 Distributed system is the system,
comprising of autonomous computers,
which are connected with the help of
distribution middleware (Chen et al.).
 Distributed system helps to share various
capabilities and resources for providing
their users with single and integrated
coherent network.
Introduction

 Transparency: Achievement of image of
any single system image.
 Reliability: Distributed system has the
high capability to be secure, consistent and
higher capability of the masking errors.
 Performance: The distributed system
provides better performance than others.
 Scalability: This distributed system is
scalable in respect to size and
administration.
Major Objectives of Distributed
System

 Components in the system are concurrent This
allows sharing of resources like software by
systems that are linked to the network.
 There could be several components, however
they would be autonomous in nature (Orgerie,
Assuncao and Lefevre).
 The ratio of rice and performance is better.
 The fault tolerance is greater in distributed
system.
Key Features of Distributed System

 The computers in he distributed system
might vary in function and size and could
range from workstation to mainframe
system.
 The database can be easily shared over
various computers and communication is
possible by several communication media
like telephone lines (Tzafestas).
 The distributed system comprises of one
logical database that is split to various
segments and every segment is stored.
Key Features Contd..

 In distributed systems, the databases are
administered separately and thus have slow
interconnectivity. Whereas, in parallel system,
the databases are not administered separately
(Wilcox et al.).
 The local as well as global transactions are
differentiated within distributed system and this
is absent in parallel system.
Differences between Distributed system and Parallel
system

There are various significant advantages of
distributed system. They are as follows:
 Data Sharing: The user can easily access
the data from any one site and that is
residing at the other sites (Ports et al.).
 Autonomy: Distributed system can
eventually control the data and thus degree
of control is retained easily.
Advantages of Distributed
System

 Globalized Database: The third
advantage of this distributed system is the
presence of globalized database.
 Availability: The better availability of
distributed system is another important
advantage (Buticchi, Emilio and Giovanni).
 Better Performance: Distributed system
provides better performance to the other
systems.
Advantages contd…

 Adding up of More Resources: Extra
resources could be easily added up in
distributed system.
 Recovery of Malfunction: If any specific
node of a distributed system is corrupted,
the other node can easily recover the
malfunction (Tzafestas).
Advantages Contd..

 Costs of Software Development: The
implementation of the distributed system
often becomes extremely costly and thus is
termed as expensive in nature (Chen et al.).
 Higher Potential for the Bugs: The
distributed system can operate parallel and it
is extremely harder in ensuring the
appropriateness of all the algorithms.
Disadvantages of Distributed System

 Increase in Processing Overhead: The
significant exchange of data and
computation needs in achieving the inter
site coordination can be termed as the form
of overhead, which never arises in the
centralized system (Ports et al.).
 Lack of Security: The next disadvantage
of distributed system is that security
problem is extremely common here and
hence various users do not opt for
distributed system.
Disadvantages Contd..