【发布时间】:2018-09-21 12:29:05
【问题描述】:
我正在使用搜索和扫描方法从弹性搜索获取数据到熊猫。我的文件数以亿计。我注意到一件奇怪的事情。当我在同一时间段内匹配我的 pandas 和 kibana 中的数字时,数字是不一样的。持续时间越长,我得到的差异就越大。有时它更多地出现在 kibana 中,有时在同一时期出现在 pandas 中,但大多数情况下它在 pandas 中更大。这是正常的吗?还是因为我正在解析的数据量大?
长话短说,为什么 kibana 和 pandas 的记录数有差异?
下面是我用来从弹性搜索中获取数据的代码:-
import pandas as pd
import datetime
import elasticsearch
import elasticsearch.helpers
from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search
from pandasticsearch import DataFrame
from pandasticsearch import Select
from elasticsearch import Elasticsearch, helpers
import os
# Define the client which will be our elastic cluster URL
client = Elasticsearch(['localhost.com:9200'])
# Define search method on the client by using the Search function.
search = Search(using=client) # make sure that the Search function start with Capital S (Search(using=client)) as this is a function.
# Get all the results from the search method and store it in result to know how many hits we are getting.
results = search.execute()
# To know about the total number of hits we are getting run the below chunk.
results.hits.total # (I got 3.9 billion hits as a result)
# Again I am defining a method s on which we will perform the query. you have to run this method everytime before running the query.
s = Search(using=client)
# add any filters/queries....
# The below line you can use if you want to dump all the data and in this case we have 2.3 billion observation.
#s = s.query({"match_all": {}})
# In the below code you can add filters,queries or time constraints.
s = s.query({"constant_score" : {
"filter" : {
"bool" : {
"must" : [{
"range": {"@timestamp" : {
"gte": "2018-09-20T16:00:00.000Z", # gte - greater than
"lte": "2018-09-20T17:00:00.000Z" # lte - less than
}}
}],
"filter": [
{"term" :{"type" :"abc"}},
{"term" :{"ua" :"xyz"}},
{"term" :{"domain":"ghj"}},]
}}}})
# After getting all the result in the variable s, we are applying scan method on it and converting it into a data frame.
results_df = pd.DataFrame((d.to_dict() for d in s.scan()))
【问题讨论】:
-
您没有在搜索中定义任何特定索引?
-
我的索引是每天的日期,所以它的工作方式就是这样。你有没有遇到过这样的问题。永远
-
可能存在时区问题,因为 Kibana 在浏览器时区中显示日期。您是否使用 Inspector/Spy 面板检查了发送到 ES 的查询?
-
我检查了时区...它们是相同的...差异不是很大,只有 1%,但我很好奇为什么我在熊猫中获得更多数字。我不确定检查员/间谍面板是什么。但我的问题是关于 kibana。我没有在 kibana 仪表板上得到准确的数字。我说得通吗?
标签: python elasticsearch logstash kibana elastic-stack