How Is GENI Set Up?¶
For the purposes of this section, the lower-level details of how GENI is set up are spared. The “Additional Resources” section, although, contains a link to a more extensive document authored by the GENI Project Office.
GENI Setup: A Developer’s View¶
The basic work-flow of a developer looking to start building on GENI offers a nice view on the structure of the GENI project. So let’s consider Alice, a fictional GENI wannabe-experimenter.
From the top: Clearinghouse
In order to start interacting with GENI, Alice need to become a GENI user. Alice can obtain credentials from a GENI Clearinghouse. A GENI Clearing house can issue credentials that are federated, meaning that they are recognized by all GENI Management Authorities.
What’s in a Management Authority?
A Management Authority, or Manager, is an organization or institution that makes resources available to experimenters like Alice. These resources are made available via APIs. As a developer, Alice does not have to deal directly with these APIs because of GENI tools that are available to her.
Once Alice has GENI credentials, she can use tools like OMNI or Flack. Because Alice wants to dive in quickly, she opts for Flack, the visual web-based option.
Alice wants to start an experiment, so she needs to create an environment for her experiment, called a slice. The slice Alice creates via Flack will be recognized throughout by all of the GENI Management Authorities, which supply the resources and slivers that she needs.
What’s a Sliver?
Once Alice has her slice set up, she’ll want to request virtual machines from different Managers. The virtual machines, and any other resources that Alice might request are collectively referred to as slivers. They are called ‘slivers’ because they are often virtualized and shared components of a physical machine.
Whereas a slice is a global container for Alice’s experiments, the collection of resources she is using on any given site is referred to as a sliver. So if she has 2 nodes running in Utah, that’s one sliver, and her nodes running in Washington DC are in another sliver.
And that’s it
Now that you have a basic idea of how GENI is set up from a (very) high level, it’s best to move on the the more extensive GENI Terms and Concepts section.