What's the status of secondary index? It was described as "half-ready" here[1]. Is that still the case?
Also does Scylla support some sort of data locality as far as secondary index is concerned?
For example if I want to store comments, I'd want to store all comments that belong to the same forum thread in a single node. All these comments have the same thread_id. Then I can have a secondary index on thread_id. When I want to get all comments that belong to a certain thread I can just query on the thread_id secondary index and only 1 node is queried. Is that possible?