AWS SDK Version 4 for .NET
API Reference

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Setting controls how your function accesses data from an Amazon S3 file system.

Inheritance Hierarchy

System.Object
  Amazon.Lambda.Model.S3FilesConfig

Namespace: Amazon.Lambda.Model
Assembly: AWSSDK.Lambda.dll
Version: 3.x.y.z

Syntax

C#
public class S3FilesConfig

The S3FilesConfig type exposes the following members

Constructors

NameDescription
Public Method S3FilesConfig()

Properties

NameTypeDescription
Public Property DirectS3Read Amazon.Lambda.DirectS3Read

Gets and sets the property DirectS3Read.

Specifies if a function reads from the file system for the lowest latency, or through Amazon S3 Files feature "direct Amazon S3 bucket reads" for the highest throughput. Valid values:

  • AUTO (default) – Direct reads are active for functions you configure with 512 MB or more of memory.

  • ENABLED – Enforces all reads are directly from the Amazon S3 bucket, regardless of available memory (less than 512 MB).

  • DISABLED – Routes all reads through the file system, regardless of memory configuration.

To use direct reads, you must grant the execution role the s3:GetObject and s3:GetObjectVersion permissions. If a direct read fails, Lambda automatically falls back to reading through the file system.

Version Information

.NET:
Supported in: 8.0 and newer, Core 3.1

.NET Standard:
Supported in: 2.0

.NET Framework:
Supported in: 4.7.2 and newer