I have a 2 node cluster , do i need to edit each node configuration? , or do i need to create namespace on each node in the cluster?
or it’s enough to just change on one node and changes will apply on the other members?
You must configure each machine individually. There is no centralized configuration mechanism in Aerospike. Create a configuration file on a single host, make sure that it is working for that one machine, and then copy the configuration file to the other nodes in the cluster and only change the few configuration parameters that would potentially be different (typically network addresses, depending on the configuration).