grid 2000 - focale1 towards a grid view of generic components based distributed applications g....

GRID 2000 - FOCALE 1

Towards a GRID view ofgeneric components baseddistributed applications

G. Scotto di Apollonia

LIFL, [email protected]

http://corbaweb.lifl.fr


Motivations

Large-scale distributed applications made of components distributed everywhere

Intensive computations mathematics , virtual reality, data warehousing

Use of supercomputersUse of high-speed networks


Definitions

Computation component Program doing a specified task

Genericity => any language

Input/output channelsGenericity => any stream

Distributed application: Graph of components:

Link between inputs and outputs


Facilities needed

Easy and intuitive application construction Focus on algorithm rather than distribution

Management of generic components Any language, any communication mean Reusable programs Automatic deployment Factory design pattern


Factory design pattern (basic)

Knows a component descriptor and its instances

One method: Instanciate

Factory

InstanceInstanciate

Componentdescription


Generic component description

Trader entry properties (name = value) “name”=“mycomp”

Binary file path command line

I/O streams spec. Type, location...

Trader entry

Properties

Binary

File

Input Output

Factory


Separate targets

For applications:

Federation of computation serverson a large scale

Execution platform Launches applications Components

deployment

For developers:

Environment helping the development of distributed applications

Graphical tool Application construction Displays state & results


Platform levels

Top-down architecture elements: Federation Server structure Application description Component factory Connector


What do we need ?

Federation (conceptual view)

Distributed intelligencedeployment, trading service (yellow pages)

C1 C2 C3

S1S2

S3S4

C1 C2 C3


Federation (servers view)

Interconnected

Factories

Applications Client

Interconnected

Factories

Applications

Interconnected

Interconnected

What do we have to provide ?

Factories

Applications Factories

Applications


Server

ServerC

lients

C

OR

BA

CO

RB

A

Running instances

Applications

FactoriesOth

er s

erve

rs

Inte

rcon

nec

ted

Tra

der

Connectors


Application

DataEntry

Transpose

Invert Storage

Display

Component graphApplication description server


Instanciating an application

Instanciate

A

B

C

D

Application description

B

Application instance

A

D

C

instanciating and linking all components


ConnectorC

omp

onen

t p

rod

uci

ng

dat

a

Com

pon

ent

con

sum

ing

dat

a

File

Socket

Console

Method

File

Socket

Console

Method

Con

nec

torO

utp

ut

Con

nec

torI

np

ut

CORBA

Any stream to any stream connectors


machine A machine B

Connector instance

Created after component instanciation

resource

resource

write

watch

update

readsend

producer thread

output thread consumer thread

input thread


Implementation

To this day, we have servers, managing component installation application management and deployment component interconnection with file and

stream

user graphical console

Choices: Java and CORBA


Related work

Java-based Ajents, ProActive

Components-based NetPebbles, Comet, Regis

CORBA incoming proposals Parallel CORBA, Aggregated Computing


Environment


Overview

grid 2000 - focale1 towards a grid view of generic components based distributed applications g....

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