Guidance for Cloud-Native Fast-Turnaround Media Workflows on AWS
Overview
How it works
TAMS concept overview
This architecture diagram shows the concept about how a Time Addressable Media Store (TAMS) sits at the core of a fast-turnaround workflow for processing live or near-live video and audio content.
TAMS data structure
This architecture diagram shows the high-level data structure represented in the TAMS API specification. This diagram establishes the connection between the content that a user would be aware of and the actual media essence, which is stored in multiple formats and segments on the object storage system.
AWS open source TAMS API
This architecture diagram shows the components and data flows within the AWS open source implementation of the TAMS API.
AWS open source TAMS tools
This architecture diagram demonstrates how the multiple components of the AWS TAMS Tools repository can be used alongside the core AWS open source TAMS implementation.
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Well-Architected Pillars
The architecture diagram above is an example of a Solution created with Well-Architected best practices in mind. To be fully Well-Architected, you should follow as many Well-Architected best practices as possible.
Operational Excellence
The AWS open source implementation of the TAMS API uses AWS X-Ray to trace requests through the serverless infrastructure, including API Gateway, Lambda, and DynamoDB. The X-Ray service aids developers and support teams in tracking and analyzing requests as they flow through the various components of the AWS open-source implementation of the TAMS API.
In addition, all logs and metrics are collected within Amazon CloudWatch to facilitate monitoring and analysis. The metrics collected within CloudWatch support the creation of dashboards and the configuration of alarms.
Security
The TAMS API uses Amazon S3 pre-signed URLs to provide consumers with time-limited access to only the required segments, helping ensure that access control is managed centrally by the API, regardless of the consumer's location, whether within AWS or on-premises.
The AWS open-source implementation of the TAMS specification uses Amazon Cognito by default for authentication, providing OAuth2-based access control on the API, in addition to the ability to federate with other authentication providers. The current API implementation supports coarse-grained, role-based permissions across the various CRUD operations, with the team actively working on extending this to incorporate attribute-based access control (ABAC) in the near future.
Reliability
The AWS open-source implementation of the TAMS API exclusively uses AWS Regional-level services, including Amazon S3, API Gateway, Lambda, and DynamoDB. This design approach eliminates the need for AWS customers to manage Availability Zone-level resilience. Additionally, all the services employed will automatically scale and recover from any underlying issues.
Performance Efficiency
In the AWS open-source implementation of the TAMS, the database technologies have been carefully selected to provide optimal performance for the diverse access patterns. The sources and flows require complex linking and filtering capabilities, for which Neptune, a graph database, has been chosen as the appropriate solution. For the segments, the access patterns are more straightforward, but speed and performance are critical to handle the ingestion of new segments as they arrive. As a result, DynamoDB has been utilized to deliver the required performance characteristics.
Cost Optimization
The TAMS-based approach eliminates the need for high-performance file storage alongside the object storage, as it maintains a single copy of the media on lower-cost object storage. The API facilitates the reuse of media segments across different content, thereby deduplicating the media at the storage level and resulting in savings in both storage space and cost.
The AWS open-source implementation of the TAMS is built around serverless components that scale and incur costs based on usage. Given that most media workloads exhibit peaky demand patterns, this design approach reduces costs to just the persistence layer (Amazon S3, DynamoDB, Neptune) when the system is not actively in use.
Sustainability
The TAMS approach to live media workflows is inherently more optimized and, consequently, more sustainable than traditional methods. At the storage level, there is no longer a requirement for high-performance file systems alongside Amazon S3 object storage, and the storage can be deduplicated, resulting in reduced space requirements.
The use of serverless technologies helps ensure that during periods of low usage, the resources are automatically scaled back, thereby reducing the environmental impact. In contrast, traditional on-premises broadcast solutions would typically remain operational 24/7, regardless of usage patterns.
The edit-by-reference model employed in the TAMS has the potential to reduce the need for rendering on edit workstations, thereby saving compute time and potentially allowing the use of smaller compute instances.
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