Jeroen van der Ham

1
Resource Brokering and Modeling

• Jeroen van der Ham Paola Grosso
• UvA - AIR group
• http//www.science.uva.nl/research/air/

2
Our motivation

• The questions from the user
• - how can I reserve paths (lightpaths) and book
  resources to run my applications?
• The questions from the provider
• - How can we provide consistent interfaces?
• - How can we keep a consistent reservation system
  for the resources we control?
• End goal
• - Completely automate the reservation and
  brokering for scenarios such as SC2004.
• Web services is an interesting solution to allow
  the users to access information on resources,
  their properties and services.

3
Which resources?
4
UvA LightHouse

• The control and brokering of the UvA/SARA
  LightHouse is our first implementation.
• Reason for this choice
• equipment we control and manage (gt single
  domain)
• A layer2 switch (Force10) soon another Layer2/3
  switch
• A photonic switch (GlimmerGlass)
• Computing nodes (VanGogh and Rembrandt clusters)
• connection to NetherLight
• World-wide access from researchers
• Need for resources coordination
• The interesting difference
• The LightHouse is about more than just network
  equipment control (UCLP, DRAC) computing element
  need to be reserved too.

5
Resource brokering

• Client goal is simple
• two resources need to be connected to each
  other.
• Main goal of a broker
• path determination
• How two resources are made to communicate with
  each other?
• resource management
• How resources are assigned to users in coherent
  fashion?
• resource monitoring
• How resource usage is monitored for planning
  purposes, for security assessment and error
  recovery?
• performance monitoring
• How the user request, service levels are
  guaranteed and monitored?

6
Resources and reservations
Starting point The definition of the basic
element, such resources, reservations, paths
7
Path determination
Second step Definition of the interfaces to the
client What should the client be able to know?
The complete list of resources The list of types
of resources The list of resources of a certain
type The list of resources available at a certain
time The possibility of creating a path between
two resources
8
Resource Management

• The client can
• check for availability of a path
• reserve a path
• - cancel/confirm

• The broker will
• maintain a list of resources
• maintain the list of reservation

9
Under the hood.
We need a model for the underlying network
elements, so that we can control them
10
WEB portals

• 1. Network Element modeling
• http//trafficlight.uva.netherlight.nl8080/AIR/
• For network element monitoring and simple
  configuration.
• This integrated with the AAA server from UvA (you
  need a username and a password to use it)
• 2. Resource Broker portal (under development)
• http//trafficlight.uva.netherlight.nl8080/RB/
• For reservation of resources.

11
Conclusions

• This is work in progress aiming for complete
  version for use in iGrid2005 and SC05 (Sep. and
  Nov. 2005).
• More information is available on
• http//vangogh0.uva.netherlight.nl/AIRWebServices/
  WS-Intro.html
• Comments and questions?
• grosso_at_science.uva.nl
• vdham_at_science.uva.nl