Configure camunda bpm in multiple clusture

I need to know how the camunda can be configured in multiple clusture ?so ,that whenever any one node fails, the camunda should not be stoped. it should keep on running with other node.

You just need to make sure each node is connected to the same data source. Thats basically it, there’s no other configuration needed on the engine side.

is there any way to make an use of two multiple database at a time? , so whenever any operation is performed from camunda. it should make an entry in multiple database .

In that case you would still connect each node to the same data-source and if you wanted to create that data in a 2nd data-source then you could hook into the History Event Stream and send the data to another source.

Generally speaking - if 2 nodes share the same database they are clustered if they have their own data-source they are not.