Deep Learning AMI and AWS Deep Learning Containers are now enabled with support for SOCI snapshotter and index. Seekable OCI (SOCI) is a technology that enables efficient container image management through selective file downloading. It uses a layer-based indexing system to map file locations within container images, allowing containers to start with only the necessary files loaded (lazy loading). This approach reduces network bandwidth usage and improves container startup times, making it particularly valuable for organizations managing large container images in cloud environments.

In this post, we look at how to use SOCI on publicly available Deep Learning AMIs and Containers, when to use the various SOCI modes provided by the tool, and how to quickly and efficiently use this tool in your workloads today.

As organizations deploy artificial intelligence (AI) and machine learning (ML) workloads at scale, container startup time has become a bottleneck in production environments. Whether it’s spinning up training jobs, serving inference endpoints, or scaling GPU clusters automatically, the time spent downloading multi-gigabyte container images directly impacts cost, user experience, and operational efficiency. Traditional container deployment approaches force teams to download entire images before workloads can begin. This process can take multiple minutes to start up images commonly used in production. During development, a few minutes of wait time is barely noticeable. In production, those same minutes add up fast.

Organizations deploying deep learning infrastructure at scale typically encounter several critical challenges:

When pulling a container for your workloads, AWS Deep Learning AMIs (DLAMI) and Deep Learning Containers offer three options: the standard Docker pull, SOCI parallel pull, and SOCI lazy loading through SOCI index. Think of these as a sliding scale of tradeoffs. Docker pulls are sequential and slow. SOCI parallel pull provides faster startup times by chunking downloads at the cost of compute resources. SOCI lazy loading provides near-instant container loading but requires files to be fetched on demand. You can use the following guide to choose the right mechanism for your workloads:

The following example shows the various mechanisms based on the vLLM Deep Learning Container: