Elasticsearch访问直方图

Question

我是Elasticsearch的新手,我无法根据访问范围构建直方图.我甚至不确定是否可以通过在Elasticsearch中使用单个查询来创建此类图表,但我感觉可能通过管道聚合或可能是脚本聚合.

这是我正在使用的测试数据集:

PUT /test_histo
{ "settings": { "number_of_shards": 1 }}

PUT /test_histo/_mapping/visit
{
   "properties": {
      "user": {"type": "string" },
      "datevisit": {"type": "date"},
      "page": {"type": "string"}
   }
}

POST test_histo/visit/_bulk
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"John","page":"home.html","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"Jean","page":"productXX.hmtl","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"Robert","page":"home.html","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"Mary","page":"home.html","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"Mary","page":"media_center.html","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"John","page":"home.html","datevisit":"2015-11-25"}
{"index":{"_index":"test_histo","_type":"visit"}}
{"user":"John","page":"media_center.html","datevisit":"2015-11-26"}

如果我们考虑范围[1,2 [,[2,3 [,[3,inf.[

预期结果应该是:

• [1,2 [= 2
• [2,3 [= 1
• [3,inf.[= 1

我所有努力找到显示客户访问频率的直方图至今仍未成功.我很乐意提供一些提示,技巧或想法来回答我的问题.

Answer 1

看一下：

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-datehistogram-aggregation.html

如果您想以精美的已固定 UI 方式显示它，请使用 Kibana。

像这样的查询：

GET _search
{
   "query": {
      "match_all": {}
   }, 
   {
    "aggs" : {
        "visits" : {
            "date_histogram" : {
                "field" : "datevisit",
                "interval" : "month"
            }
        }
    }
}
}

应该给你一个直方图，我现在没有松紧带，所以我可能有一些粗手指的打字错误。

然后，您可以广告查询词以仅显示特定页面的直方图，您可以有一个聚合/页面或用户的外部聚合存储桶。

像这样的东西：

GET _search
{
   "query": {
      "match_all": {}
   }, 
   {
       {
    "aggs" : {
        "users" : {
            "terms" : {
                "field" : "user",
            },
        "aggs" : {
            "visits" : {
                "date_histogram" : {
                    "field" : "datevisit",
                    "interval" : "month"
                }
            }
        }
  }
}