Information Technology Reference
In-Depth Information
Fig. 12.1:
Architectural perspective of the online gaming scenario with the hosting environments,
the gateways, the VAS, and the VOMS (Virtual Organisation Toolkit)
The B2B gateways at each participating partner (Andago, Sunny, and Saygah) allow
each partner to securely connect to the collaboration and expose their services in
a contextualized way. Each participating partner also has a service gateway which
handles the instantiation and virtualization of the application instances - in this case
the Data Centre factories which will be used to create, host, and run new games
instances at either of Sunny or Saygah.
12.2.1.2 Four Steps towards Managed Dynamic Collaborations
Using VOMS, the organisation can follow a rigorous four-step process to create and
manage collaborations implemented over the B2B gateway, the VAS infrastructure
services, the VOMS, and the hosting environments. These four steps are VO iden-
tification, formation, operation, and dissolution. The VOM Coordination Services
provided by the VHE operator help liaise between the different partners' VOM
member services and manage the lifecycle of the given collaboration (see fig. 12.1).
During the first phase, the organisation identifies relevant partners based on
service types they offer and the QoS they guarantee for each service. QoS here
relates to high-level customer expectations e.g. a 'gold service experience'. These
high-level QoS (HL-QoS) are then translated into lower-level QoS (LL-QoS) such
as service latency, CPU usage, and so on depending on the business rules defined.
At this time, high-level contracts have been drafted from which lower-level policies
and rules can be derived.
