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An RSS Perspective on CDDLM, ACS, InfoServ + Us. Donal Fellows University of Manchester OGSA-RSS, GGF15, Boston. What Does (and Doesn’t) CDDLM Offer?. System for Deploying Very Complex Apps Modern Apps are Multi-Layered

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an rss perspective on cddlm acs infoserv us

An RSS Perspective onCDDLM, ACS, InfoServ + Us

Donal FellowsUniversity of Manchester

OGSA-RSS, GGF15, Boston

what does and doesn t cddlm offer
What Does (and Doesn’t)CDDLM Offer?
  • System for Deploying Very Complex Apps
    • Modern Apps are Multi-Layered
      • Grid Engine on J2EE on Database on Virtual OS on real OS on Bare Metal…
    • One Level’s Execute is Higher Level’s Deploy
  • No Allocation
    • Context/Caller Decides Where to Deploy
  • No Actual Data
what about acs
What about ACS?
  • General Data Store
    • Good Place to Keep Packaged Apps Ready for Deployment (under CDDLM control)
    • Not Sure Who Specifies the Format of the App Packages
      • But doesn’t matter to us!
  • Supports Complex Querying
    • i.e., it is an Info Service!
    • No Specification of Data Model
information services
Information Services
  • InfoServs Provide…
    • Way of Discovering Properties of an Entity (e.g., a Service) without Direct Querying every time
    • Way of Discovering an Entity by its Properties
      • Addressing by Content
      • e.g., XPath, XQuery, …
  • InfoServs are (Usually) Agnostic about Data Model
what do we need
What Do We Need?
  • Way to Get/Generate Set of Containers that can Host Apps for a Particular User
    • Containers may be Generated on Demand
  • Way to Discover if App is Available or Deployable
    • Available = App Ready for Use Now
    • Deployable = App can be Made Ready for Use
  • Way to Check if App A is Available or Deployable on Container B