Changes between Version 19 and Version 20 of orca-introduction

Show
Ignore:
Timestamp:
04/22/11 16:29:28 (8 years ago)
Author:
ibaldin (IP: 108.65.61.102)
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • orca-introduction

    v19 v20  
    3434Authorities delegate resources to brokers (one authority can delegate resources to several brokers). Brokers hold the promised resources until Service Managers request them. Brokers issue tickets for resources from different authorities to a Service Manager and a Service Manager redeems those tickets at Authorities. Authorities instantiate the resource slivers and pass the control of them to the Service Manager. Pluggable control and access policies help mediate these transactions. Query interfaces allow actors to asynchronously determine the state of other actors.  
    3535 
    36 Slices are used to group resources together. A slice in a Service Manager represents resources owned by a particular user (e.g. for the purpose of an experiment). A slice in a broker represents a portion of slivers given to a particular service manager slice from this broker. A slice in an authority represents the resources given by this authority to a particular service manager slice. Notice that architecturally in ORCA ''only the Service Manager knows the exact composition of the slice''. All other actors may have only a partial view of the slice.  
     36Slices are used to group resources together. A slice in a Service Manager represents resources owned by a particular user (e.g. for the purpose of an experiment). A slice in a Broker represents a portion of slivers given to a particular service manager slice from this Broker. If a Service Manager acquires resources from multiple brokers, they are not aware of each other. A slice in an authority represents the resources given by this authority to a particular service manager slice. Notice that architecturally in ORCA ''only the Service Manager knows the exact composition of the slice''. All other actors may have only a partial view of the slice.  
    3737 
    3838== Further reading ==