On a HA HDFS, I tried to add SecondaryNameNode. Here is what I face:
When I add the SecondaryNameNode role instance, I got "validation error":
Federated SecondaryNameNode secondarynamenode (mybigdata) is not configured with a Nameservice
When I configure nameservice as the nameservice of the HDFS cluster, I got "validation error" :
Nameservice nameservice1 has 2 NameNodes and 1 SecondaryNameNode(s)
So, how to correctly configure the SecondaryNameNode? What's the correct number of NameNode / SecondaryNameNode
Actually, we are getting around 200MB edit log in 1 month. Is is OK not to have SecondaryNameNode?
CDH 5.1, 5.2