ZK needs a quorum to keep functional so 3 servers handles one failure. 5 handles 2 node failures. If you Solr with 1 replica per shard then stick to 3 ZK. If you use 2 replicas use 5 ZK
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ZK needs a quorum to keep functional so 3 servers handles one failure. 5 handles 2 node failures. If you Solr with 1 replica per shard then stick to 3 ZK. If you use 2 replicas use 5 ZK
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