ES Configurations

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Shards

Modify the default number of shards

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PUT http://localhost:9200/_template/index_defaults 
{
  "index_patterns": "*", 
  "settings": {
    "number_of_shards": 3,
    "number_of_replicas": 0,
    "index.refresh_interval":"15s",
    "index.translog": {
        "sync_interval": "120s",
        "durability": "async", 
        "flush_threshold_size":"1g"
    }
  }
}

# curl -XPOST  -H "Content-Type:application/json" -d '{"template":"*","settings":{"number_of_shards":1}}' http://elasticsearch-client-service:9200/_template/default
# curl -XPOST  -H "Content-Type:application/json" -d '{"template":"*","settings":{"number_of_shards":3,"number_of_replicas":0,"index.refresh_interval":"60s","index.translog":{"sync_interval":"120s","durability":"async","flush_threshold_size":"1g"}}}' http://elasticsearch-client-service:9200/_template/default
# https://www.jianshu.com/p/f0e9ab2a47fe
# https://www.objectrocket.com/blog/elasticsearch/clustered-elasticsearch-best-practices/
# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html