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R1 Artifacts
from https://lists.onap.org/pipermail/onap-discuss/2017-October/005356.html
Titan sits on top of a HBase storage backend - http://s3.thinkaurelius.com/docs/titan/1.0.0/hbase.html
Older Artifacts (Early 2017)
Active and Available Inventory (AAI) is the OpenECOMP ONAP subsystem that provides real-time views of available Resources, and Services, Products, Offers, and their relationships. AAI (sometimes referred to as A&AI) not only forms a registry of active, available, and assigned assets, it also maintains up-to-date views of the multidimensional relationships among these assets, including their relevance to different components of OpenECOMPONAP.
In addition to inventory and topology management, AAI provides the ability to do inventory administration, reporting and notification. Data in AAI is continually updated in real-time as changes are made within the cloud. Because AAI is metadata-driven, new inventory item types resources and services can be added dynamically and quickly with Service Design and Creation (SDC) catalog definitions, using the AAI model loader, thus eliminating the need for lengthy development cycles. In addition, new inventory item types can be added quickly through schema configuration files.
The AAI subsystem uses graph data technology to store relationships between inventory items. Graph traversals can then be used to identify chains of dependencies between items. Relationships captured by AAI include "top-to-bottom" relationships such as those defined in SDC when products are composed of services, and services are composed of resources. It also includes “side-to-side” relationships such as end-to-end connectivity of virtualized functions to form service chains. AAI also keeps track of the span of control of each controller, and is queried by MSO and placement functions to identify which controller to invoke to perform a given operation.
AAI data views can be used by homing logic during real-time service delivery, root cause analysis of problems, impact analysis, capacity management, software license management and many other functions.
An API enables queries to AAI from clients, and two user interfaces provide visual access to inventory details and data integrity statisticsThe AAI API provides programmatic access to AAI.
Figure 1 provides a functional view of AAI.
Figure 1. Active and Available Inventory (AAI) functional diagram
Inventory and topology management
AAI federates inventory using uses a central registry to create a global view of inventory and network topology. AAI receives updates from various inventory masters distributed throughout the OpenECOMP ONAP infrastructure, and persists just enough to maintain the global view. As transactions occur, AAI persists asset attributes and relationships into the federated view based on configurable metadata definitions for each activity that determine what is relevant to the AAI inventory. AAI provides standard APIs to enable queries from various clients regarding inventory and topology. Queries can be supported for a specific asset or a collection of assets. The AAI global view of relationships is necessary for forming aggregate views of detailed inventory across the distributed master data sources.
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AAI also performs a number of administrative functions. Metadata models for the various assets are stored, updated, applied and versioned dynamically as needed without requiring a system shutdown for maintenance. Given the distributed nature of AAI as well as the relationships with other OpenECOMP components, audits are periodically run to assure that AAI is in sync with the inventory masters such as controllers and MSO. Adapters allow AAI to interoperate with other systems as well as 3rd party cloud providers via evolving cloud standards.
Reporting and notification
Consistent with other OpenECOMP applications, AAI produces canned and ad-hoc reports, integrates with the OpenECOMP dashboards, publishes notifications that other OpenECOMP components can subscribe to, and performs logging that is consistent with configurable framework constraints.
Accessing AAI data
Two separate user interfaces, accessed from the OpenECOMP Portal, provide inventory information:
- AAI UI: Provides details about specific service instances. Users can search by attribute name or ID, view a visual representation of the service hierarchy and related nodes, and view specific details of a node.
- Data Integrity UI: Provides information about the quality and validity inventory data. This information can be provided for a specific time period, or for specific object types or dates.
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