IARnet - NEC'2007

IARnet: A General Framework for
Porting Scientific Applications Into


Distributed Computing Environment

Oleg Sukhoroslov,
Vladimir Voloshinov


Institute for Systems Analysis, RAS, Moscow

Distributed Computing Systems Laboratory

Ian Foster. “Grid: Enabling Open Science” Keynote, Nature Conference on Asia
Pacific “Networks Promoting Excellence in Research”. June 6, 2007, Tokyo, Japan.

“Bright future” of “Grid
-
science”

Not so bright day
-
to
-
day practice


Great

potential of service
-
oriented computing


Lack of Grid
-
computing practice

in day
-
to
-
day research


Limited scope of application (batch
-
computing mostly)


Existing tools are too complex.


Strong need in a simple
-
to
-
use framework for
sharing and collaborative use of application

resources
as a
remote services

IARnet in a few words

IAR

denotes
I
nformation
-
A
lgorithmic
R
esources


A software toolkit for transforming scientific tools
into remotely accessible services


Promotes sharing and collaborative use of existing
tools


Avoids unnecessary complexity, making the toolkit
easy to learn and to use (both for service and client
developers)

The concept
-

in 2003, a name
IARnet

-

2004, first
version (IARnet v1) in 2005
-
06.

IARnet resource and agents

IARnet resource Agent unified
interface (v1)

Resource Agent
connected with resource


Programming Model

Service Container

Calculator

double sum(double[] args)

CalcuatorService

(Resource Agent)

@Remote

double add(double a, double b) {


return calculator.sum(…);

}

CalculatorService s = new CalculatorService(…);

Container container = new Container(port, …);

ResourceReference
ref

= container.deploy(s);

container.start();

Transport Plug
-
in

Transport Plug
-
in

IARnet Client API

Client Application

Remote Invocation

Resource calc = LocateResource.getResource(
ref
);

Double sum = (Double) calc.invoke(“
add(double,double):double
",
----
--

--
new Object[]{ new Double(1.1), new Double(2.2) });

….


WS (SOAP)

CORBA

Ice

WS (SOAP)

CORBA

Ice

IARnet features (v1)


Languages


Java, C++ for service implementations


Java for client applications


Data types


Primitive, arrays, lists, sets, maps


Transport plug
-
ins


CORBA, SOAP, Ice (www.zeroc.com)


Asynchronous calls


Services


Information Service (publish/discovery), Workflow
Management Service

Information Service (v1)

IARnet ontology (OWL)

Workflow Management Service (v1)

Applications benefiting from
IARnet


Problems, which can be decomposed into
multiple sub
-
problems might be solved by
existing application


Coordination between resources is needed


Interactive control of application execution




Distributed algorithm for solving optimal control problem


Distributed simulation models (e.g., macro
-
economy, ecology)


Geoinformation applications


Branch
-
and
-
bound methods for global optimization




IARnet and existing Grid
-
systems

Thank you!


For more information please contact us

IARnet:

Oleg Sukhoroslov,
os@isa.ru
,


Vladimir Voloshinov,
vv_vol@isa.ru


IARnet (v1) architecture

Future: IARnet2


Based on Ice (zeroc.com) middleware

Elegant and powerful interface definition language

Support for C++, Java, C#, Visual Basic, Python, PHP, and Ruby

High performance and scalability


Built
-
in security

Password and SSL authentication, pluggable authorization modules,

session management, support for virtual organizations


Scalable site model

Set of services managed by some person or organization

IARnet2 site can scale from a single desktop to a server pool


Avoids unnecessary complexity

Much easier to use than programming services with GT4

Prototype implementation in Java is available

IARnet levels


IARnet
levels