Access Grid Overview

1
Access Grid Overview

• Access Grid Workshop
• APAC 05
• ag-info_at_mcs.anl.gov

2
Vision
3
Realization
4
Basic Operation
(oversimplified)
Enter
Venue
Venue Client
audio address, video address
audio multicast group
Audio Tool
video multicast group
Video Tool
5
Access Grid Architecture

• VenueServer
• Server component for Venues
• Venue
• Virtual representation of a meeting room
• Participants
• Data
• Shared Applications
• VenueClient
• User software for entering a Venue and
  interacting with contents
• Node
• Aggregation of hardware and software for
  participating in a meeting

VenueServer
Venue
Venue Client
Node
6
Venue Architecture
Venue
Data Store
Data Store
Event Service
Text Service
Data Store
Shared Application

• EventService
• Distributes events to clients to maintain
  coherence wrt Venue state
• TextService
• Distributes text events to clients for chat
• DataStore
• Stores files and handles file transfers
• SharedApplication
• Venue-resident component of shared applications
• NetworkService
• Network-resident Venue service

Network Service
7
Venue Client Architecture
VenueClient
Event Client
Text Client
Data Store Client

• EventClient
• Connects to EventService to maintain coherence
  wrt Venue contents
• TextClient
• Connects to Venue TextService for chat
• DataStoreClient
• Interfaces with Venue DataStore for file transfer

8
Node Architecture
Node

• NodeService
• Aggregates ServiceManagers
• Manages node configurations
• ServiceManager
• Exposes available machine resources
• Manages AGServices (for video, audio, etc.)
• AGService
• Interface for controlling access to machine
  resources
• Exposes service configuration interface

Node Service
Service Manager
AGService
9
Technology Choices

• Python
• pyGlobus
• GSI for SOAP, event, text, data connections
• Proxy certificate generation
• pyOpenSSL
• X509 certificate manipulation
• wxPython
• User interface

10
What well cover

• Thursday
• Installation
• Configuration
• Introduction to AG development
• AG application basics
• Available SOAP interfaces
• Shared Applications

• Friday
• Node Services
• Network Services
• Authorization
• DataStore

11
Materials

• ANL AG pages
• http//www.mcs.anl.gov/fl/research/accessgrid
• Developer documentation
• Workshop slides and exercise code
• API Documentation
• Shared Application Programmers manual
• Node Services Programmers manual
• (Network Services Programmers manual)