A Simple Analogy

S3 advanced features are like setting rules for your filing cabinet. Auto-archive old files, keep multiple versions, organize with tags.

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Why Advanced Features?

• Cost optimization: Auto-tier old data
• Compliance: Keep audit trails
• Performance: Multipart uploads for large files
• Reliability: Versioning prevents accidents
• Organization: Tagging and lifecycles

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Versioning

# Enable versioning
aws s3api put-bucket-versioning \
  --bucket my-bucket \
  --versioning-configuration Status=Enabled

# List versions
aws s3api list-object-versions \
  --bucket my-bucket \
  --key myfile.txt

# Restore old version
aws s3api get-object \
  --bucket my-bucket \
  --key myfile.txt \
  --version-id ABC123 \
  restored-file.txt

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Lifecycle Policies

{
  "Rules": [
    {
      "Id": "archive-old-logs",
      "Filter": { "Prefix": "logs/" },
      "Status": "Enabled",
      "Transitions": [
        {
          "Days": 30,
          "StorageClass": "STANDARD_IA"
        },
        {
          "Days": 90,
          "StorageClass": "GLACIER"
        }
      ],
      "Expiration": { "Days": 365 }
    }
  ]
}

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Multipart Upload

var client = new AmazonS3Client();

var uploadRequest = new InitiateMultipartUploadRequest
{
    BucketName = "my-bucket",
    Key = "large-file.zip"
};

var uploadResponse = await client.InitiateMultipartUploadAsync(uploadRequest);
var uploadId = uploadResponse.UploadId;

var partETags = new List<PartETag>();
var partSize = 5 * 1024 * 1024; // 5MB

using (var fileStream = File.OpenRead("large-file.zip"))
{
    for (int partNumber = 1; fileStream.Position < fileStream.Length; partNumber++)
    {
        var uploadPartRequest = new UploadPartRequest
        {
            BucketName = "my-bucket",
            Key = "large-file.zip",
            UploadId = uploadId,
            PartNumber = partNumber,
            InputStream = fileStream
        };

        var uploadPartResponse = await client.UploadPartAsync(uploadPartRequest);
        partETags.Add(new PartETag
        {
            ETag = uploadPartResponse.ETag,
            PartNumber = partNumber
        });
    }
}

var completeRequest = new CompleteMultipartUploadRequest
{
    BucketName = "my-bucket",
    Key = "large-file.zip",
    UploadId = uploadId,
    PartETags = partETags
};

await client.CompleteMultipartUploadAsync(completeRequest);

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Tagging and Querying

{
  "TagSet": [
    { "Key": "Environment", "Value": "Production" },
    { "Key": "Department", "Value": "Finance" },
    { "Key": "Retention", "Value": "7-years" }
  ]
}

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Best Practices

1. Enable versioning: Prevent accidental deletes
2. Use lifecycle: Auto-archive old data
3. Multipart: Use for files > 100MB
4. Tagging: Organize and manage costs
5. Access logs: Audit who accesses what

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Related Concepts

• S3 Transfer Acceleration
• CloudFront distribution
• Object Lock (compliance)
• S3 Select (query in place)

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Summary

Use S3 versioning, lifecycle policies, multipart uploads, and tagging for robust, cost-effective storage at scale.