[ogsa-wg] Service creation in OGSA?

[Dave Berry]

Dear OGSA WG,
 
I have an action from the OGSA Dqta WG to ask you about service
creation.  When creating services in OGSA, how does the client specify
the following properties:

- Lifetime of Service
- (Storage) Size
- Default QoS requirements 
- Default (security) policies
- Service Location (on which Server say) 
- Provisioning
 
Do you have a common pattern for service creation, or common definitions
of the above items?
 
Currently we are assuming the existence of factory services that can
create shorter-term services.  E.g. in data transport, the long-lived
service will create a short-lived service that manages the actual data
transfer.  Clients will send control messages to the shorter-lived
service.
 
This seems similar to the pattern originally encoded in OGSI.  Is it
still the OGSA-approved way to manage service creation?
 
Best wishes,
 
Dave Berry
Deputy Director, Research & E-infrastructure Development
National e-Science Centre, 15 South College Street
Edinburgh, EH8 9AA                  +44 131 651 4039
 
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