Customers running applications with more than one containers on Amazon Elastic Container Service (ECS) with AWS Fargate can now leverage Seekable OCI (SOCI) to lazily load specific container images within the Amazon ECS task definition. This eliminates the need to generate SOCI indexes for smaller container images within the task definition, while still getting the benefits of SOCI with larger container images, improving the overall application deployment and scale-out time.
Source:: Amazon AWS