如何检索时间戳以及弹性聚合中的最小值

Question

我正在对弹性数据集执行聚合查询我想检索一个时间跨度内的最大值和最小值我用

实现了这个

"aggs": {
    "DateRangeFilter": {
      "filter": {
        "range": {
          "@timestamp": {
            "gte": "2015-10-16T11:13:17.000",
            "lte": "2015-10-16T12:29:47.000"
          }
        }
      },
      "aggs": {
        "min_chan4": {
          "min": {
            "field": "ch_004"
          }
        },
        "max_chan4": {
          "max": {
            "field": "ch_004"
          }
}

这给了我：

"DateRangeFilter": {
    "doc_count": 153,
    "min_chan4": {
      "value": 0.7463656663894653
    },
    "max_chan4": {
      "value": 5.170884132385254
    }

太棒了。

我还需要检索每个事件发生的 time 我的文档如下所示：

    "_source": {
      "GroupId": "blahblah",
      "@timestamp": "2015-10-14T12:41:30Z",
      "ch_004": 1.5608633995056154
    }

所以我希望不仅能够检索给定日期范围内的最小值和最大值，还能检索记录最小值或最大值的时间 (@timestamp)

例如最小值 minX 出现在时间 t1，最大值 maxX 出现在时间 t2

Answer 1

你可以通过Top Hits Aggregation. example can be found :

来实现

{
  "aggs": {
    "DateRangeFilter": {
      "filter": {
        "range": {
          "@timestamp": {
            "gte": "2015-10-16T11:13:17.000",
            "lte": "2015-10-16T12:29:47.000"
          }
        }
      },
      "aggs": {
        "ch_004_min": {
          "top_hits": {
            "size": 1,
            "sort": [
              {
                "timestamp": {
                  "order": "asc"
                }
              }
            ]
          }
        },
        "ch_004_max": {
          "top_hits": {
            "size": 1,
            "sort": [
              {
                "timestamp": {
                  "order": "desc"
                }
              }
            ]
          }
        }
      }
    }
  }
}

如何检索时间戳以及弹性聚合中的最小值

How to retrieve timestamp along with minimum value within an elastic aggregation

elasticsearch

bucket

elasticsearch-aggregation