Difference between revisions of "Leveraging CMDBf"

Revision as of 12:11, 31 August 2007

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This page is the beginning of where we can begin our discussions on the CMDBf specification.

Specification

The CMDBf specification can be found here: http://cmdbf.org/

Overview

The COSMOS project intends to produce a reference implementation of a CMDBf Management Data Repository (MDR). The project will demonstrate how a client can use multiple MDRs through the CMDBf query interfaces and registration services to display information from multiple management systems. COSMOS will also create any additional infrastructure required to support the basic use case.

Basic Use Case

The image below is an overview of the most basic use case.

• Correct the picture: In the service broker, they both should be CMDBfQuery
• Add Management Domain to picture... maybe another use case for bootstrapping
• Need sequence diagram for use case
• Add a line from the client directly to the MDRs. This is the use case where we want to bypass the federated database.

Requirements

These are the high level requirements necessary to complete the implementation of CMDBf. We will break these down into bugzilla enhancement requests.

(Needs to be expanded on during the call... this is just a start....)

• Query
  • Implement the CMDBf as a Muse capability. Bind to the CMDBf API
  • Start on Binding to Ali's API
  • Map CMDBf query to convenience APIs for SML repo, Stat repo, and CBE repo (this is the data set issues)

• Registration
  • How do we reconcile the registration of MDRs vs. the item relationship
  • Do we need registration in the first round? Start with a focus on Query.
• Data Broker 197867: Need to design and implement the COSMOS DC Data Broker for i6
• WS-RC 198553: Provide an implementation of WS Resource Catalog
• Client updates 197870: Need to design and implement the COSMOS DC client APIs
• UI work for sheldon
• Reconcilliation
  • Need to make sure that the IDs line up or that we have only simplistic means of aligning the different resources
  • This gets into a bit of the taxonomies. May need simplistic mappings.
• MDRs look like Data Managers

• DataBroker/ProviderRegistry as MDR

Based on a discussion of the proposed DataBroker design, it appears that what is desired is a combination of an EPR registry for locating DataManagers and a repository of existing data sets that can be processed by those DataManagers. From the use case described above, it appears that the ProviderRegistry should act as an MDR to surface its knowledge of datasets and there attached metadata. If we are going to adopt the CMDBf query dialect as our lingua franca for communicating topology/metadata type information, then it makes sense to apply the CMDBf query capability to both the topology repository and the SDMX-style dataset/keyset repository of the ProviderRegistry.

Notes

The Data Broker is intended to be a simple component.

• Clarification of Registration v. Query (Push vs. Pull).
• MDR Negotiation: The handshake b/t the MDR and the Broker in order to facilitate Pull

• Need to outline the use case of bootstrapping the MDR with the management domain.

File:Dcframework2.zip

Ali and David's design is here-->COSMOS_Design_200222

Notes from 8-31 call

Want to have pluggable reconcilliation. Define an "idResolver interface"

• Want to have CMDBf query APIs in front of the data broker
  • Need to provide example of what is returned from the query, e.g. the graph query result
    • We'll need the EPR of the MDR, maybe some way to determine how to build a query for the MDR

• Break down the cmbdf query green box to separate the web services part
  • Break down the web services into the muse capabilities

In the interest of time, don't worry about the ws-rc APIs on the broker