Document multi-zone / multi-region setup

Requirement - what kind of business use case are you trying to solve?

Application is spread out across multiple clusters and traffic is routed to a cluster based on client location. How to have one Jaeger UI to see traces in all the clusters?

Is it possible to have collector,db,query and ui all in one cluster where all agents running in multiple clusters send their traces to? And if so is there a way to tag/label the span with cluster/region name?

Problem - what in Jaeger blocks you from solving the requirement?

There is no documentation on what the possible/best patterns are.