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AWS Lambda now supports S3 Files, letting functions mount S3 buckets as file systems for direct read/write without object downloads. This simplifies stateful and AI/ML workflows by enabling shared workspaces and automatic checkpointing via durable functions.
- Lambda functions can now mount S3 buckets directly as file systems (S3 Files, built on EFS) instead of downloading/uploading objects in code
- Multiple Lambda functions can access the same S3 Files mount simultaneously for shared, real-time workspaces without custom locking
- Combined with durable functions for checkpointing, this avoids the 512 MB /tmp storage limit for stateful, multi-step workflows like AI/ML pipelines
- Setup works through the Lambda console, CLI, SDKs, CloudFormation, or SAM, with no extra fee beyond normal Lambda and S3 pricing