Buckets And Objects

Buckets

• Store objects (aka files) in Buckets (aka directories)
• Should be globally unique name
• Although S3 is Global, buckets are Region Specific
• Naming convention
• No Uppercase
• No Underscore
• 3 to 63 characters
• No IP
• Start with
  • Lowercase
  • Number

Objects

• Objects has Bucket Name, Prefix, and File Name
• For a object
• When Object name is s3://bucket_name/key
  • Here bucket_name is the Bucket Name
  • No Prefix here
  • key is the file name
• When Object name is s3://bucket_name/folder_1/folder_2/key
  • Here bucket_name is the Bucket Name
  • folder_1 and folder_2 is the Nested Folder, where the File placed
  • key is the file name
• There is no Folder concept in the S3, UI tricks to think that way
• Object can be at most 5TB size
• Can not upload a Object more than 5GB without multipart
• Object Metadata contains
• User Metadata
• System Metadata
• Tag can be added
• Max 10 Tags supported
• Use for
  • Security
  • Lifecycle Policy
• When Versioning is enabled, then the Object has Version ID