How to fetch a bulk of datas concurrently from different nodes in subscription.

[sayonaramemori]

Hey team,
I want to monitor some nodes and fetch them as a record logging to databases with a fixed time interval. And I have tried to implement it with subscription but getting some problems. DataConsumer is independent per item. So I couldn't fetch them in a single function to record them concurrently. May it can be solved by simply reading every node in a function then recording them. However, I think it's not an elegant way. So could you give me some suggestions? Thanks a lot!!!