SAI DEEPTHI YARLAGADDA
STUDY OF JAVA BASED
GRID COMPUTING
APRIL 30TH 2003
WHAT IS GRID COMPUTING
• A grid is a collection of distributed computing
resources available over a local or wide area
network that appear to end user or application as
one large virtual computing system
TYPES OF GRIDS
• Cluster grid:Consists of
one or more systems
working together to
provide a single point of
access to users.
• Campus grid:Multiple
projects or departments
share computing resources
in a cooperative way
• Global grid:The power of
distributed resources to
anywhere in the world
JAVA COMMODITY GRID KIT
• A COMMODITY GRID TOOLKIT (CoG Kit) defines and
implements a set of general components that map grid
functionality into a commodity environment/framework.
(ex:java CoG Kit,CORBA CoG Kit,DCOM CoG Kit ETC)
• Why use Java CoG Kit, the ten reasons to use java CoG Kit are
The Language
The Maintenance
The Class Library
The Performance
The Components
The Gadgets
The Deployment
The Industry
The Portability
The Community
RELATED WORKS
ALiCE - A JAVA BASED GRID COMPUTING
SYTEM
ALiCE is a Adaptive and scaLable Internet-based
Computing engine
• Supports computing on demand and resource
sharing.
• Supports the development and execution of
generic grid applications.
• It is a middleware that provides a programming
abstraction as well as masking the heterogeneity
of the underlying networks ,hardware and
operating systems.
MAIN FEATURES
• Job parallelism to maximize throughput and object
parallelism to maximize performance
• Distributed load balancing algorithm
application driven distributed load balancing ;
task replications for fault-tolerant and to meet performance
deadline
• Levels of security at varying costs
• Usage of Java,Java Jini/Java Spaces technologies
• Adaptive parallelism,cross-platform
portability,extensibility and scalability
ALiCE PRODUCER CONSUMER MODEL
Consumers(clients):
Interface to users
Launch point for applications
Collection point for results
Producers(servers):
Provide computing power
Executes tasks
Resource brokers(RB):
Authentication
Application execution control
Resource management
ALiCE EXECUTION MODEL
Visualizer
4.Result
collector
results
Consumer
1.Task generator at
Resource broker
initiates applications
and produces a pool
of tasks
Resource
Broker
Producer 1
Producer 2
2.the task execute method
is run at the producers
Producer n
results
3.Result objects produced are
returned to the resource broker
ALiCE PROGRAMMING TEMPLATES
• Task generator:Allows application to be invoked at the
resource broker by invocation of the users main method
• Result collector:Allows applications to be invoked at the
consumer node,waiting for results to be returned from the
resource broker
• Task:Allows the producer nodes to result a return object to
the resource broker upon completing the execution
• Result:Provides an interface for producer to instantiate
and returns any evaluated or intermediate data
Allows users to store the result of execution
AliCE APPLICATIONS
• Ray tracing , Mandelbrot set , georectification of
satellite images
What does grid security include
• Remote access security management
preventing user forgery,server forgery,data wiretapping
and remote attack.
• User rights security management
adding restricted delegation on user,preventing user abuse
resources.
• Task security management
protecting communication between processes,system
integrity and preventing malicious programs.
GRID APPLICATION AREAS
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Higher education
Agricultural chemicals
Life sciences
Electronic industry
Aerospace
Government(information access)
Automotive
Financial services
Workshop
CUSTOMER EXAMPLES
• University of Pennsylvania,University of Chicago,
University of California
• NASA
• UK national grid
• Butterfly.net
• Netherlands computing grid
• Distributed terascale facility
• US department of energy
• National digital mammographic archive(NDMA)
QUESTIONS
?