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@@ -97,6 +97,18 @@ This variable sets the name of the cluster and must be the same for all nodes in
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This variable sets number of tokens for this node. It will set the [`num_tokens`](http://docs.datastax.com/en/cassandra/2.1/cassandra/configuration/configCassandra_yaml_r.html?scroll=reference_ds_qfg_n1r_1k__num_tokens) option of `cassandra.yaml`.
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+### `CASSANDRA_DC`
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+This variable sets the datacenter name of this node. It will set the [`dc`](http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchGossipPF_c.html) option of `cassandra-rackdc.properties`.
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+### `CASSANDRA_RACK`
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+This variable sets the rack name of this node. It will set the [`rack`](http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchGossipPF_c.html) option of `cassandra-rackdc.properties`.
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+### `CASSANDRA_ENDPOINT_SNITCH`
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+This variable sets the snitch implementation this node will use. It will set the [`endpoint_snitch`](http://docs.datastax.com/en/cassandra/2.1/cassandra/configuration/configCassandra_yaml_r.html?scroll=reference_ds_qfg_n1r_1k__endpoint_snitch) option of `cassandra.yml`.
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# Caveats
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## Where to Store Data
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Tianon Gravi