If you find yourself repeatedly creating indexes with some similar
characteristics, then you create an index template. Whenever you create a
new index and if a template exists that matches it, then the template will
be applied along with whatever you have predefined inside the template. An
example is below (taken directly from the docs -
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-templates.html#multiple-templates):
curl -XPUT localhost:9200/_template/template_1 -d '
{
"template" : "te*",
"settings" : {
"number_of_shards" : 1
},
"mappings" : {
"type1" : {
"_source" : { "enabled" : false }
}
}
}
'
The above template says, if anybody creates a new index in the future with
a name that starts with te ("te*"), then automatically make 1 shard for it,
and disable the _source field.
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