On 6/11/2018 5:47 AM, THADC wrote:
Shawn, thanks. You say "at least two replicas per shard are required for high availability". So that would be a total of three nodes for that shard, correct?
The smallest possible fault-tolerant Solr install is a total of three servers. Two of them will run Solr and ZooKeeper, one of them will run ZooKeeper only, and might be a server with lower specs than the other two. Each collection will be built so that each shard has one replica on one Solr node, and the other replica on the other Solr node.
So I think the answer to your question is no, there only needs be two nodes. If you want to have three nodes and three replicas per shard, you can certainly set it up that way.
Thanks, Shawn
