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4 Node Cassandra Cluster, Each Node Owns 50.00%

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Started 3 months ago by mustafa
Latest reply from Julien.Campan
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mustafa
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I am running 4 node on a Cassandra cluster built in Windows platform. When I run

nodetool -h localhost ring

command on seed node, I see each nodes in up status, normal state and own 50.00% which I expect to see 25.00%. Is this normal to see the each node owns the 50.00%?

Here is the configuration of each node;

1. Node
rpc_address: 0.0.0.0
initial_token: -9223372036854775808
listen_address: [IP Addres of the machine]
seeds: "[IP Addres of the seed machine (1. Node)]"

2. Node
rpc_address: 0.0.0.0
initial_token: -4611686018427387904
listen_address: [IP Addres of the machine]
seeds: "[IP Addres of the seed machine (1. Node)]"

3. Node
rpc_address: 0.0.0.0
initial_token: 0
listen_address: [IP Addres of the machine]
seeds: "[IP Addres of the seed machine (1. Node)]"

4. Node
rpc_address: 0.0.0.0
initial_token: 4611686018427387904
listen_address: [IP Addres of the machine]
seeds: "[IP Addres of the seed machine (1. Node)]"

Initial Tokens calculated by using this formula; (2^64 / 4) * [NodeIndex] - 2^63

Cassandra 1.2.1 installed in each node. Any idea about the 50.00% value for each node?

Posted 3 months ago #
Julien.Campan
Member

Hello,

In fact when you use the command line nodetool ring or nodetool status, the % represent the % of your data on each node, (with their replica).

For exemple, if you have a cluster with one keyspace with a replication factor of 3, you will have 300 % of data on all your cluster.

So in your case , i think that you made a keyspace with a replication factor of 2.So you have 200 % of your real data on the cluster and 50 % on each node.

Posted 3 months ago #

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