Your node shouldn't show up in DC1 in nodetool status from the other nodes, this implies a configuration problem. Sounds like you haven't added the new node to all the existing nodes cassandra-topology.properties file. You don't need to do a rolling restart with PropertyFileSnitch, it should reload the cassandra-topology.properties file automatically every 5 seconds.
With GPFS each node only needs to know about its own topology settings in cassandra-rackdc.properties, so the problem you point out in 2 goes away, as when adding a node you only need to specify its configuration and that will be propagated to the rest of the cluster through gossip. On 24 October 2017 at 07:13, shalom sagges <shalomsag...@gmail.com> wrote: > 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! > > > > > >
