Feature #17349
Updated by Nico César almost 4 years ago
This specification is for the server side (client side of this will be on separate tickets,). The component railsapi (endpoint /arvados/v1/collections) and making sure that controller has all the plumbing in place This ticket will cover (api) * railsapi (including storing in the database) * controller * documentation updates with the new behaviour This ticket will not cover * client behaviour * keep-balance behavirour Current behaviour for collections' "replicas_desired" is to accept a Number[1] 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: |_. replicas_desired |_. storage_classes_desired |_. defaultCollectionReplication |_. Collection Effective Value |_. Notes | | null (or omited from the request) | null | 3 | {"default": 3} | | | null (or omited from the request) | null | 2 | {"default": 2} | current behaviour see [2] | | 42 | null | 2 | {"default": 42} | | | 34 | null | 2 | {"default": 34} | | | 1 |["MyStorageClass"] |["archival"] | 2 | {"default": 0, "MyStorageClass": "archival": 1} | | | 1 |["default","MyStorageClass"] |["default","archival"] | 2 | {"default": 1, "MyStorageClass": "archival": 1} | How does defaultCollectionReplication affects this?| | The "Effective value" is the amount of copies stored in each storage class. class To be talked in next grooming session: * 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 * What should we do when returning current values ? should we return replicas_desired=42 or replicas_desired={"default":42} ? * How will backward compatibility works here? * if the current effective value is {"default": 1, "archival": 1}, how old client will react? [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