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From Tamar Fraenkel <ta...@tok-media.com>
Subject running two rings on the same subnet
Date Mon, 05 Mar 2012 10:06:33 GMT
Hi!
I have a Cassandra  cluster with two nodes

nodetool ring -h localhost
Address         DC          Rack        Status State   Load            Owns
   Token

   85070591730234615865843651857942052864
10.0.0.19       datacenter1 rack1       Up     Normal  488.74 KB
50.00%  0
10.0.0.28       datacenter1 rack1       Up     Normal  504.63 KB
50.00%  85070591730234615865843651857942052864

I want to create a second ring with the same name but two different nodes.
using tokengentool I get the same tokens as they are affected from the
number of nodes in a ring.

My question is like this:
Lets say I create two new VMs, with IPs: 10.0.0.31 and 10.0.0.11
*In 10.0.0.31 cassandra.yaml I will set*
initial_token: 0
seeds: "10.0.0.31"
listen_address: 10.0.0.31
rpc_address: 0.0.0.0

*In 10.0.0.11 cassandra.yaml I will set*
initial_token: 85070591730234615865843651857942052864
seeds: "10.0.0.31"
listen_address: 10.0.0.11
rpc_address: 0.0.0.0

*Would the rings be separate?*

Thanks,

*Tamar Fraenkel *
Senior Software Engineer, TOK Media

[image: Inline image 1]

tamar@tok-media.com
Tel:   +972 2 6409736
Mob:  +972 54 8356490
Fax:   +972 2 5612956

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