Explain Distributed Systems With Examples, What Is Distributed Operating System With Advantages,
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Distributed SystemIn distributed systems, the processors
can’t share memory or a clock, each
processor has its own local memory. The
processors communicate with one anther
through various communication lines.
Such a high speed buses. These systems
are usually referred to as loosely coupled
systems or distributed systems.
Distributed System
There are so many advantages using Distributed systems.
These are
• Resource sharing: If a number of sites connected by a high
speed communication lines, it is possible to share the resources
from one site to another site.
For example s1 and s2 are two sites, these are connected by
some communication lines the site s1 having a printer, But the
site s2 does not having printer. Then the system can use the
printer at s1 with out moving from s2 to s1. There fore
resource sharing is possible in distributed systems.
• Computation Speedup: A big computation is partitioned into
number of partitions, these sub partitions run concurrently in
Distributed systems. For example site s1 need to execute a big
computation, this computation is divided into sub computation
and these are executed by some other machines in different
sites.
Distributed System
• Reliability: If a resource or a system failed in one site due to
technical problems. We can use other systems or other
resources in some other sites, because these systems are
connected by high speed lines. So the reliability will
increase in Distributed systems.
• Communication: processes are communicate with one
another via “Electronic Mail” is possible in Distributed
systems. Because these systems are connected by
communication lines.
Distributed System
• A collection of independent computers
that appears to its users as a single
coherent system.
l Two aspects of this definition:
1. Hardware: the machines are autonomous.
2. Software: the users think they are dealing a single
system (which is achieved by software).
Examples of Distributed Systems
l Computer world:
Computer network
GRID (distributed computing facilities)
l Ordinary life:
WWW, P2P systems (such as Napster)
Banks (Cash machines)
Ticket reservation
Distributed System
Figure 1-1. A distributed system organized as
middleware. The middleware layer extends over multiple
machines, and offers each application the same interface