The other nodes all have copies of the same data. To optimize performance, all of them stream different parts of the data, even though 102 has all the data that 108 needs. (I think. I'm not an expert.) -Brennan
On Thu, Nov 1, 2012 at 9:31 AM, Ramesh Natarajan <rames...@gmail.com> wrote: > I am trying to bootstrap cassandra 1.0.10 cluster of 7 nodes to 14 nodes. > > My seed nodes are 101, 102, 103 and 104. > > Here is my initial ring > > Address DC Rack Status State Load > Owns Token > > 145835300108973627198589117470757804908 > 192.168.1.101 datacenter1 rack1 Up Normal 8.16 GB > 14.29% 0 > 192.168.1.102 datacenter1 rack1 Up Normal 8.68 GB > 14.29% 24305883351495604533098186245126300818 > 192.168.1.103 datacenter1 rack1 Up Normal 8.45 GB > 14.29% 48611766702991209066196372490252601636 > 192.168.1.104 datacenter1 rack1 Up Normal 8.16 GB > 14.29% 72917650054486813599294558735378902454 > 192.168.1.105 datacenter1 rack1 Up Normal 8.33 GB > 14.29% 97223533405982418132392744980505203272 > 192.168.1.106 datacenter1 rack1 Up Normal 8.71 GB > 14.29% 121529416757478022665490931225631504090 > 192.168.1.107 datacenter1 rack1 Up Normal 8.41 GB > 14.29% 145835300108973627198589117470757804908 > > I add a new node 108 with the initial_token between 101 and 102. After I > start bootstrapping, I see the node is placed in the ring in correct place > > Address DC Rack Status State Load > Owns Token > > 145835300108973627198589117470757804908 > 192.168.1.101 datacenter1 rack1 Up Normal 8.16 GB > 14.29% 0 > 192.168.1.108 datacenter1 rack1 Up Joining 114.61 KB > 7.14% 12152941675747802266549093122563150409 > 192.168.1.102 datacenter1 rack1 Up Normal 8.68 GB > 7.14% 24305883351495604533098186245126300818 > 192.168.1.103 datacenter1 rack1 Up Normal 8.4 GB > 14.29% 48611766702991209066196372490252601636 > 192.168.1.104 datacenter1 rack1 Up Normal 8.15 GB > 14.29% 72917650054486813599294558735378902454 > 192.168.1.105 datacenter1 rack1 Up Normal 8.33 GB > 14.29% 97223533405982418132392744980505203272 > 192.168.1.106 datacenter1 rack1 Up Normal 8.71 GB > 14.29% 121529416757478022665490931225631504090 > 192.168.1.107 datacenter1 rack1 Up Normal 8.41 GB > 14.29% 145835300108973627198589117470757804908 > > What puzzles me is when I look at the netstats I see nodes 107,104 and 103 > are streaming data to 108. Can someone explain why this happens? I was > under the impression that only node 102 needs to split the tokens and send > to 108. Am I missing something? > > > Streaming from: /192.168.1.107 > Streaming from: /192.168.1.104 > Streaming from: /192.168.1.103 > > > Thanks > Ramesh > > > > > >
