Buckets and Objects

Buckets:

• I like to think of them as directories which can contain files in them and the files are known as "Objects" and directories are known as "Buckets".

• Bucket name must be unique across the whole world and it can't have uppercases or underscores, etc.

• Buckets need to be defined at which region they are, so buckets are a regional thing.

• You can configure the bucket for website hosting and host a static file on S3 if you upload the website files. To access the website, you're bucket must be public otherwise you get a 403 (Forbidden) error.

• Can enable versioning to create multiple versions of your file, to protect against accidental deletes and to roll back to a previous version of a file.

• You can use S3 access logs to log all the access to S3 buckets and objects, so you can see causes of issues and any suspicious activity.

• Can't change its region or name after creation.

• Can't have buckets within buckets.

Objects:

• Consists of a file and some metadata that describes the file.

• Key is the full file path; it identifies the object within a bucket.

• Max size for an object is 5TB (this isn't needed for the exam but it's just a good fact to know).