Introducing Multipart Download Support for AWS SDK for .NET Transfer Manager
Developer Tools Blog
This article introduces multipart download support in AWS SDK for .NET Transfer Manager, enabling faster parallel downloads of large S3 objects.
- Automatic multipart coordination eliminates complex concurrent connection management code
- Supports both part number and byte-range download strategies for flexibility
- Part number downloads work best for multipart-uploaded objects; byte-range for any S3 object
- Configure concurrent requests, buffer size, and memory usage for optimal performance
- Use DownloadWithResponseAsync for files and OpenStreamWithResponseAsync for streams
- MaxInMemoryParts and ChunkBufferSize control memory consumption during streaming
- DownloadDirectoryWithResponseAsync automatically applies multipart to multiple objects
- Migrate existing code using new WithResponse methods for metadata access
Multipart downloads in AWS SDK for .NET v4 significantly improve S3 transfer performance through parallel requests while simplifying developer code.
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