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From Ramesh Natarajan <rames...@gmail.com>
Subject cassandra 1.0.10 : Bootstrapping 7 node cluster to 14 nodes
Date Thu, 01 Nov 2012 16:31:13 GMT
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

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