Networking: Applications and Services

1
Networking Applications and Services

• Antonia Ghiselli, INFN
• Stu Loken, LBNL
• Chairs

2
Overview

• The network is still critical for HENP
• Many applications are designed to use the network
• New techniques are emerging to measure
  performance
• There emerges an operating system for the
  network

3
The Network Services View
Applications
Chemistry
Data Analysis
ion
Biology
Application Toolkits
Distributed
Data-
Remote
Problem
Remote
Collaborative
Computing
Intensive
Visualization
Solving
Instrumentation
Applications
Applications
Applications
Applications
Applications
Applications
Toolkit
Toolkit
Toolkit
Toolkit
Toolkit
Toolkit
Middleware
Resource-independent and application-independent
services

E.g.,
authentication, authorization, resource
location, resource allocation, events, accounting,
remote data access, information, policy, fault
detection
Network Layer
Resource-specific implementations of basic
services

E.g., Transport protocols, name servers,
differentiated services, CPU schedulers, public
key
infrastructure, site accounting, directory
service, OS bypass
4
Applications

• Monitoring and Managing Distributed Processes
• Objectivity/AMS on Wide Area Network
• Remote control of experiment using QoS
• Radiotherapy with remote consulting

5
Tools

• Next Generation of Virtual Room Videoconferencing
  System
• Voice over IP
• Video Conferencing on PC
• Web-based source code navigator
• FreeHEP library for code of community interest
• CERN Web services architecture (logical URL)

6
Middleware or Common Services

• CORBA used as framework for building applications
• Condor used to provide high-throughput computing
• Grid Services being integrated into testbeds and
  large-scale computational systems

7
Network Layer

• Mostly built on commodity networks
• Some very high-speed examples such as Gigabit
  System Network (GSN)
• New tools for traffic measurement and analysis

8
Special Issues

• Security
• Protect resources and still allow access
• Good system management as well as strong
  authentication
• Quality of Service
• Differentiated Services in addition to best
  effort
• QoS is critical for some tools and applications

9
Conclusion

• Network continues to be a critical service
• We are seeing an evolution to higher level
  services