Hi, the paper paper below mention workspaces (is that the same as clusters?) sharing the same physical tables(databases)? How can I do that in the managed cloud version?
https://dl.acm.org/doi/pdf/10.1145/3514221.3526055
Welcome aboard Matt! 
I’m just going to confirm with the internal team before answering these questions. Will post some updates soon. Thanks, in advance, for your patience. 
Happy Friday Matt!
Here is some more information and resources that may offer some clarification. Hope it helps and we look forward to hearing more about your interests/projects with workspaces. Cheers! 
A workspace is an independent deployment of compute resources which can be used to run a workload.
A database may be attached to many workspaces simultaneously, facilitating multiple workloads to operate on shared data.
Here’s a link to our doc that goes into more detail on What is a workspace.
Workspaces can also be managed within our portal UI or using our management API.
Here’s a link to our doc on Creating and Using Workspaces.