（四）Exploring Your Cluster

The REST API

Now that we have our node (and cluster) up and running, the next step is to understand how to communicate with it. Fortunately, Elasticsearch provides a very comprehensive and powerful REST API that you can use to interact with your cluster. Among the few things that can be done with the API are as follows:

如今咱們已經啓動並運行了節點（和集羣），下一步是瞭解如何與它進行通訊。幸運的是，Elasticsearch提供了一個很是全面和強大的REST API，您能夠使用它與集羣進行交互。使用API​​能夠完成的一些事項以下：

　　一、Check your cluster, node, and index health, status, and statistics

　　檢查羣集，節點和索引運行情況，狀態和統計信息

 　　二、Administer your cluster, node, and index data and metadata

　　管理您的羣集，節點和索引數據和元數據

 　　三、Perform CRUD (Create, Read, Update, and Delete) and search operations against your indexes

        對索引執行CRUD（建立，讀取，更新和刪除）和搜索操做

 　　四、Execute advanced search operations such as paging, sorting, filtering, scripting, aggregations, and many others

　　 執行高級搜索操做，例如分頁，排序，過濾，腳本編寫，聚合等等