Dave, A very good question. We are working on just this problem at uva - but think a broader discussion is in order. A _____ From: ogsa-wg-bounces@ogf.org [mailto:ogsa-wg-bounces@ogf.org] On Behalf Of Dave Berry Sent: Monday, December 04, 2006 12:41 PM To: ogsa-wg Cc: ogsa-d-wg@ogf.org Subject: [ogsa-wg] Service creation in OGSA? 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