### Is your feature request related to a problem? Please describe `operate-source` show tasks a long time. ### Describe the feature you'd like `operate-source show` quickly return like `list-member` ### Describe alternatives you've considered consider combine `operate-source show` to `list-member --source` ### Teachability, Documentation, Adoption, Migration Strategy Maybe we can simply return source relations and no need to [get response from worker](https://github.com/pingcap/dm/blob/6331c9d17aef03204551a2994685f5c649870d0b/dm/master/server.go#L1338).
Is your feature request related to a problem? Please describe
operate-sourceshow tasks a long time.Describe the feature you'd like
operate-source showquickly return likelist-memberDescribe alternatives you've considered
consider combine
operate-source showtolist-member --sourceTeachability, Documentation, Adoption, Migration Strategy
Maybe we can simply return source relations and no need to get response from worker.