Versioning

[aldy120]

Versioning enable: Added object have a version id and marked as latest version. Deleting an object add a delete marker.

Versioning suspended: Added object have a null version id. Deleting object add a delete marker with version id null.

[aldy120]

原本在沒開 versioning 的時候上傳的文件，會有 version id null 。如果這時候刪除，會加上一個 delete marker with version id null ，會把原本的覆蓋掉，只留下 delete marker 。

[aldy120]

When you get an object without specifying a versionId in your request, if its current version is a delete marker, Amazon S3 responds with the following:

• A 404 (Not Found) error

• A response header, x-amz-delete-marker: true

When you get an object by specifying a versionId in your request, if the specified version is a delete marker, Amazon S3 responds with the following:

• A 405 (Method Not Allowed) error

• A response header, x-amz-delete-marker: true

• A response header, Last-Modified: timestamp (only when using the HeadObject or GetObject API operations)

[aldy120]

MFA delete

• Only root user can configure
• Only CLI/SDK can configure
• Only root user can delete objects
• The root user has to provide MFA