cassandra cluster not ring

Question

I'm setting up cassandra cluster.I made the configuration changes(adding seeds). When I ring that cluster, its showing only one node. bit actually 2 nodes on my cluster. what change should be done. Thanks in advance..

Answer 1

As well as adding seeds, you need to configure the listen_address for your nodes so they aren't just listening on localhost (the same goes for the rpc_address). You need to enable auto-bootstrap for your new node, or set its token manually so that it takes on a portion of the keyspace from the original node.

See http://wiki.apache.org/cassandra/MultinodeCluster for details.

Answer 2

If you're setting up the cluster using virtual machines, this is a common scenario. Here's why: http://wiki.apache.org/cassandra/FAQ#cloned

Even if this isn't your case, as a solution, you can use the nodetool move command to re-assign the token space. For Example, on a 4 node cluster:

nodetool -h NodeA move 0
nodetool -h NodeB move 42535295865117307932921825928971026431
nodetool -h NodeC move 85070591730234615865843651857942052863
nodetool -h NodeD move 127605887595351923798765477786913079295