Arvados

This specification is for the server side (client side of this will be on separate tickets,).

Make sure that endpoint /arvados/v1/collections has all desired functionality, tests and documentation for controller and railsapi

This ticket will cover (api)

• railsapi (including storing in the database)
• controller
• documentation updates the current behaviour
• test

This ticket will not cover

• client behaviour
• keep-balance behavirour

Acording to the documentation the current behaviour for collections' "replicas_desired" is to accept a Number¹ or 'null'. Also there is an undocumented attribute "storage_classes_desired" and "storage_classes_confirmed".

"MyStorageClass" is an example name that has to match with the StorageClass configuration setting on the volume but has no particular meaning for Arvados.

Valid values:

The "Effective value" is the amount of copies stored in each storage class, this column will help to clarify cases in following tickets

• For the error send the user an error, we only will discuss the API errors. arv-put, arvados-cwl-runner and other clients will have their own ticket
• How will backward compatibility works here?

[1] https://doc.arvados.org/v2.1/api/methods/collections.html
[2] https://doc.arvados.org/v2.0/sdk/python/arvados/arvados.collection-pysrc.html#Collection._my_block_manager