Elasticsearch：范围索引中的数据本身

Question

I am trying to keep data in a certain index local to itself. I am wondering which elasticsearch setting do I need to apply in order to do so. Specifically, I would like the data in my index to NOT replicate to other nodes.

Rephrase the question: Is there a way to keep data in an index local to itself (for ALL nodes)?

node1 --> foobar_index ---> {"data" : "asdf"}

node2 --> foobar_index ---> {"data" : "qwerty"}

node3 --> foobar_index ---> {"data" : "zxcv"}

Answer 1

If you want to simply not replicate your indices, ie have a shard present on only one node, you can set the number of replicas to 0. Beware, though, that if one of your nodes goes down or gets corrupted, you might lose data.

curl -XPUT 'localhost:9200/foobar_index/_settings' -d '
{
    "index" : {
        "number_of_replicas" : 0
    }
}'