As a person responsible for the WMF backups I want to select the optimal storage solution for backing up media files.

Requirements (as defined in T262669):

• Have a "logical" approach to files (store individual files, not filesystem copies- application agnostic)
• Store also metadata about the files (name, hash, current status: soft-deleted/archived/wiped)
• Scale to the sizes WMF hosts
• Be able to quickly backup and restore a large amount of files
• Support encryption on the wire and at rest
• Files themselves will be insert-only, but had to be able to be deleted and dynamically altered its state to reflect production changes

Acceptance criteria:

• A set of storage options is selected for evaluation
• Testing methodology is defined
• Evaluation and tests are performed
• A list of pros and cons for each storage option is created and published for review