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@@ -44,7 +44,9 @@ nodes.
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Now, if we start two more nodes with `node.rack_id` set to `rack_two`,
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Elasticsearch will move shards across to the new nodes, ensuring (if possible)
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-that the primary and replica shards are never in the same rack.
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+that no two copies of the same shard will be in the same rack. However if `rack_two`
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+were to fail, taking down both of its nodes, Elasticsearch will still allocate the lost
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+shard copies to nodes in `rack_one`.
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.Prefer local shards
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*********************************************
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Boaz Leskes