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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 (A&AIAAI) 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 between among these inventory itemsassets, including their relevance to different components of OpenECOMPONAP.
In addition to inventory and topology management, AAI provides the ability to do inventory administration. Data in AAI A&AI is continually updated in real-time as changes are made within the cloud. A&AI Because AAI is metadata-driven, allowing new inventory item types to new 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 A&AI 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 A&AI include “top to bottom” 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. A&AI 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.
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Active and Available Inventory (A&AI) is the ECOMP component that provides real-time views of D2 Resources, Services, Products, and Customer Subscriptions for D2 services. Figure 12 provides a functional view of A&AI. The views provided by Active and Available Inventory relate data managed by multiple ECOMP, BSS, OSS, and network applications to form a “top to bottom” view ranging from the Products customers buy to the Services and Resources used to compose the Products. Active and Available Inventory not only forms a registry of Products, Services, and Resources, it also maintains up-to-date views of the relationships between these inventory items across their lifecycles. To deliver the vision of the dynamism of D2, Active and Available Inventory will manage these multi-dimensional relationships in real-time.
AAI data views can be used Active and Available Inventory maintains real-time Inventory and Topology data by being continually updated as changes are made within the AT&T Integrated Cloud. It uses graph data technology to store relationships between inventory items. Graph traversals can then be used to identify chains of dependencies between items. A&AI data views are used by homing logic during real-time service delivery, root cause analysis of problems, impact analysis, capacity management, software license management and many other D2 functions.
The Inventory and Topology data includes resources, service, products, and customer subscriptions, along with topological relationships between them. Relationships captured by A&AI include “top to bottom” relationships such as those defined in ASDC 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. A&AI 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. A&AI is metadata driven, allowing new inventory item types to be added dynamically and quickly via AT&T Service Design & Creation (ASDC) catalog definitions, reducing the need for lengthy development cycles
The following list provides A&AI key requirements.
x Provide accurate and timely views of Resource, Service, and Product Inventory and their relationship to the customer’s subscription.
x Deliver topologies and graphs.
x Maintain relationships to other key entities (e.g., location) as well as non-D2 inventory.
x Maintain the state of active, available and assigned inventory within ECOMP
x Allow introduction of new types of Resources, Services, and Products without a software development cycle (i.e., be metadata driven).
x Be easily accessible and consumable by internal and external clients.
x Provide functional APIs that expose invariant services and models to clients
x Provide highly available and reliable functions and APIs capable of operating as generic cloud workloads that can be placed arbitrarily within the AT&T AIC cloud infrastructure capable of supporting those workloads
x Scale incrementally as ECOMP volumes and AIC Infrastructure scales
x Perform to the requirements of clients, with quick response times and high throughput
x Enable vendor product and technology swap-outs over time, e.g., migration to a new technology for data storage or migration to a
new vendor for MSO (Master Service Orchestrator) or Controllers.
x Enable dynamic placement functions to determine which workloads are assigned to specific ECOMP components (i.e., Controllers or VNFs) for optimal performance and utilization efficiency.
x Identify the controllers to be used for any particular request.
10.2 A&AI Functionality
A&AI functionality includes Inventory and Topology Management, Administration, and Reporting & Notification.
Inventory and Topology Management
The 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 uses a central registry to create a global view of inventory and network topology. AAI receives updates from various inventory masters distributed throughout the ONAP
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infrastructure, and persists just enough to maintain the global view. As transactions occur
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,
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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
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AAI inventory.
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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
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AAI global view of relationships is necessary for forming aggregate views of detailed inventory across the distributed master data sources
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.
Administration
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Administration
AAI also performs a number of administrative functions.
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Metadata models for the various
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assets are stored, updated, applied and versioned dynamically as needed without
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requiring a system
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Reporting and Notification
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shutdown for maintenance.