Open Metadata Governance Servers
The open metadata governance servers pull combinations of the Egeria services together to support different integration patterns.
server-chassis - the server chassis provides the webserver and basic security services to support the Open Metadata and Governance (OMAG) Server Platform.
- admin-services - the admin services support:
security-sync-services - keep security enforcement engines supplied with the latest metadata.
stewardship-services - manage the triage and remediation of Request for Action annotations. Each Request for Action describes a potential issue in the data landscape. The stewardship services can initiate automatic remediation or let stewards decide which Request for Actions should be actioned. When a Request for Action is actioned, the stewardship services initiate the requested remediation.
virtualization-services - Propagate the Out Topic of Information View OMAS, build queries to data virtualization solutions and generate corresponding In Topic for IV OMAS.
open-lineage-services - provides a historic reporting warehouse for lineage.
The Open Lineage Services provides a historic reporting warehouse for lineage. It listens to events that are send out by the Asset Lineage OMAS, and stores lineage data in a Janusgraph database. This lineage can then be queried through the Open Lineage Services client and by its REST API, for example by a lineage GUI. While the data format of events sent out by the Asset Lineage Omas are in the Open Metadata format, Open Lineage services store lineage data in a very basic data format in order to optimize query performance. In essence there are 3 kinds of graphs:
- buffer graph - used to store current lineage in the Open Metadata types
- current graph - stores current lineage in graph database in the format optimimized for lineage
- historic graph - stores historic lineage in graph database in the format optimimized for lineage
License: CC BY 4.0, Copyright Contributors to the ODPi Egeria project.