如何使用 KUSTO 提取两个请求之间的时间差

Question

我有两个 Rawdata 事件，一个是具有一个时间戳的请求，另一个是具有不同时间跨度的响应，是否有一个 kusto 函数可以从 rawdata 中提取这两个日期并计算两者之间的时间差

Answer 1

是的，有。在没有看到输入数据样本的情况下为您提供最佳选择有点具有挑战性，但您可能想看看 parse 运算符：https://docs.microsoft.com/en-us/azure/kusto/query/parseoperator, or the extract() function: https://docs.microsoft.com/en-us/azure/kusto/query/extractfunction

或者，或者，在您的问题中包含示例输入，例如以下内容：

print request = "this<>is!!!my-request from 2019-08-14 17:54:36.8892211, the end",
      response = "this is the matching 2019-08-14 17:55:36.0000033 response"
| parse request with * "from " request_datetime:datetime "," *
| parse response with * "matching " response_datetime:datetime " response"
| project diff = response_datetime - request_datetime
// this returns a single table with a single column named 'diff', whose value is '00:00:59.1107822'

或

datatable(event_text:string, correlation_id:long) [
    "this<>is!!!my-request from 2019-08-14 17:54:36.8892211, the end", 1,
    "this is the matching 2019-08-14 17:55:36.0000033 response", 1,
]
| extend dt = extract(@"(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{7})", 1, event_text, typeof(datetime))
| summarize diff = max(dt) - min(dt) by correlation_id
// this returns a single table with 2 columns named 'correlation_id' and 'diff', whose values are are '1' and '00:00:59.1107822'

Answer 2

Yoni 的回答向您展示了如何提取时间戳。拥有它们后，您可以使用 datetime_diff 功能。假设您想知道 2 个时间戳之间相差多少秒：

| extend TimeDiff = datetime_diff('second', SigninTime, EventTime)

您可以使用此信息进行过滤。假设您只想保留这些时间戳彼此相差 20 秒以内的行：

| filter TimeDiff < 20

https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/datetime-difffunction

如何使用 KUSTO 提取两个请求之间的时间差

how to extract time difference between two requests using KUSTO

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