Mastering Elasticsearch Second Edition by 2015

Author:2015
Language: eng
Format: epub
Publisher: Packt Publishing

Requirement

Now, let's reuse our example cluster and try running the following command:

curl -XPUT 'localhost:9200/mastering/_settings' -d '{ "index.routing.allocation.require.tag": "node1", "index.routing.allocation.require.group": "groupA" }'

If we visualize the response of the index status command, we would see that the cluster looks like this:

As you can see, the view is different than the one when using include. This is because we tell Elasticsearch to allocate shards of the mastering index only to the nodes that match both the require parameters, and in our case, the only node that matches both is the first node.

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