1. Irbid National University
Information Technology Department
Grid computing systems

2. Grid Computing System
Through the evolution of all sciences fields, researching areas, and series of
projects which requires a massive amount of computational power, makes the
extension of using more powerful resources to handle this evolution, is
extremely mandatory.
Grid computing Is an involving network application that can be expected to
become an essentially and necessary component of the new global knowledge
economy of
the 21's century .
Grid computing can mean different things to different individual,
The grand vision is often presented as an analogy to power grids where users
(or electrical appliances) get access to electricity through wall sockets with
no care or consideration for where or how the electricity is
Actually generated.

3. In this view of grid computing ,
computing becomes
pervasive and individual
users or client applications
can gain access to computing
resources (processors,
storage, data, applications,..
and so on) as needed with
little or no knowledge of
where those resources are
located or what the
underlying technologies,
hardware, operating system
the other clients
Are uses.

4. Grid computing … definitions and facts.
• A type of parallel and distributed system that enables the sharing,
selection, and aggregation of geographically distributed resources
dynamically at runtime depending on their availability, capability
performance, cost, and users’ quality-of-service requirements

5. Definitions of Grid computing
Today there are many definitions of Grid computing…
The definitive definition of a Grid is provided by Ian Foster in his article
“What is the grid computing, A Three Point Checklist”…
The three points of this checklist are:
1. Computing resources are not administered centrally.
2. Open standards are used .
3. Non-trivial quality of service is achieved.
• Plaszczak/Wellner define Grid technology as “the technology that enables
resource virtualization, on-demand provisioning, and service (resource)
sharing between organizations.”
• IBM defines Grid Computing as “the ability, using a set of open standards and
protocols, to gain access to applications and data, processing power, storage
capacity and a vast array of other computing resources over the Internet “.

6. Some facts about grid Computing
Grid computing: is the act of sharing tasks over multiple computers, these computers joins together to create
virtual supercomputer.
Grids use the resources of many separate computers connected by a network (usually internet).
The most obvious resource included in a grid is a processor …. But grids also encompass sensors, data
storage, applications and other resources.
A scenario in which a local scheduler of network system can schedule its jobs.
 This combines hardware load sharing and distributed computer.
Grid computing creating an environment in which no system is idle.
6- Grid is composed of number of hosts. Each has several resources which may be
homogeneous or heterogeneous.

7. Benefits or goal of grid computing
* In most organizations there are large amount of underutilized computing resources. Most desktop machines
are busily less than 5% of time over a business day… In same organization, even the
Server machine can often be relatively idle.
As a solution … Grid computing provides a framework for exploiting these underutilized resources and thus
has the possibility of substantially increasing the efficiency of resource
Usage.
* Processing resources are not the only ones that may be underutilized; often machines may have enormous
unused disk drive capacity.
*grid computing (more specially , data grid ) can be use much larger virtual data store…possibly configured to
achieve improved performance and reliability over that of any single machine.