Mastering Elasticsearch - Second Edition by Rafał Kuć & Marek Rogoziński

Author:Rafał Kuć & Marek Rogoziński [Kuć, Rafał]
Language: eng
Format: epub
Publisher: Packt Publishing
Published: 2015-02-26T22:00:00+00:00

One of the properties that can be useful when having multiple nodes on a single physical server is cluster.routing.allocation.same_shard.host. When set to true, it prevents Elasticsearch from placing a primary shard and its replica (or replicas) on the same physical host. We really advise that you set this property to true if you have very powerful servers and that you go for multiple Elasticsearch nodes per physical server.

Inclusion

Now, let's use our example cluster to see how the allocation inclusion works. Let's start by deleting and recreating the mastering index by using the following commands:

curl -XDELETE 'localhost:9200/mastering' curl -XPOST 'localhost:9200/mastering' -d '{ "settings" : { "index" : { "number_of_shards" : 2, "number_of_replicas" : 0 } } }'

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