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S3 Object Metadata and Tags

Links: 102 AWS DVA Index

User Defined Metadata

  • When we upload an object we can assign metadata.
    • Metadata is just a fancy name for key-value pairs attached to the object.
  • User-defined metadata names must begin with x-amz-meta-
  • Amazon S3 stores user-defined metadata keys in lowercase.
  • Metadata can be retrieved while retrieving the object.
  • Sample metadata:
    • attachments/Pasted image 20230301085409.jpg

Object Tags

  • Key-value pairs for objects in Amazon S3
  • Useful for fine-grained permissions (only access specific objects with specific tags)
  • Useful for analytics purposes (using S3 Analytics to group by tags)
We CANNOT search objects by metadata or tags.

To search by either metadata or tags we must create an index in a database like DynamoDB. attachments/Pasted image 20230301085802.jpg

Last updated: 2023-03-01