Hi Everyone, I have 2 DCs (v2.0.14) with the following topology.properties:
DC1: xxx11=DC1:RAC1 xxx12=DC1:RAC1 xxx13=DC1:RAC1 xxx14=DC1:RAC1 xxx15=DC1:RAC1 DC2: yyy11=DC2:RAC1 yyy12=DC2:RAC1 yyy13=DC2:RAC1 yyy14=DC2:RAC1 yyy15=DC2:RAC1 # default for unknown nodes default=DC1:RAC1 Now let's say that I want to add a new node yyy16 to DC2, and I've added yyy16 to the topology properties file only on that specific node. What I saw is that during bootstrap, the new node is receiving data only from DC2 nodes (which is what I want), but nodetool status on other nodes shows that it was joining to DC1 (which is the default DC for unknown nodes). So I have a few questions on this matter: 1) What are the implications of such a bootstrap, where the joining node actually gets data from nodes in the right DC, but all nodes see it in the default DC when running nodetool status? 2) I know that I must change the topology.properties file on all nodes to be the same. If I do that, do I need to perform a rolling restart on all of the cluster before each bootstrap (which is a real pain for large clusters)? 3) Regarding the Snitch, the docs say that the recommended snitch in Production is the GossipingPropertyFileSnitch with cassandra-rackdc.properties file. What's the difference between the GossipingPropertyFileSnitchand and the PropertyFileSnitch? I currently use PropertyFileSnitch and cassandra-topology.properties. Thanks!
