搜索方法中“ _id”字段对elasticsearch的影响？

我在Elasticsearch上遇到了一些麻烦...我设法在我的机器上创建了一个可重现的示例，代码在文章结尾。

我只是创建6个用户，"Roger Sand"，"Roger Gilbert"，"Cindy Sand"，"Cindy Gilbert"，"Jean-Roger Sands"，"Sand Roger"，和它的名字指数吧。

然后，我运行查询以匹配“ Roger Sand”，并显示关联的分数。

这是同一脚本的执行，带有2组不同的id：84046至84051和84047至84052（仅移位1）。

结果顺序不同，得分也不相同：

执行84046 ... 84051

Sand Roger => 0.8838835
Roger Sand => 0.2712221
Cindy Sand => 0.22097087
Jean-Roger Sands => 0.17677669
Roger Gilbert => 0.028130025

执行84047..84052

Roger Sand => 0.2712221
Sand Roger => 0.2712221
Cindy Sand => 0.22097087
Jean-Roger Sands => 0.17677669
Roger Gilbert => 0.15891947

我的问题是，为什么“ id”会对通过“ full_name”进行的搜索产生影响？

这是可复制脚本的完整红宝石代码。

first_id = 84046 # Or 84047
client = Elasticsearch::Client.new(:log => true)
client.transport.reload_connections!
client.indices.delete({:index => 'test'})
client.indices.create({ :index => 'test' })
client.perform_request('POST', 'test/_refresh')

["Roger Sand", "Roger Gilbert", "Cindy Sand", "Cindy Gilbert", "Jean-Roger Sands", "Sand  Roger" ].each_with_index do |name, i|
  i2 = first_id + i
  client.create({
    :index => 'test', :type => 'user',
    :id => i2,
    :body => { :full_name => name }
  })
end

query_options = {
  :type => 'user', :index => 'test',
  :body => {
    :query => { :match => { :full_name => "Roger Sand" } } 
  }
}

client.perform_request('POST', 'test/_refresh')

client.search(query_options)["hits"]["hits"].each do |hit|
  $stderr.puts "#{hit["_source"]["full_name"]} => #{hit["_score"]}"
end

这是命令行

curl -XDELETE 'http://localhost:9200/test' 
curl -XPUT 'http://localhost:9200/test' 
curl -XPOST 'http://localhost:9200/test/_refresh' 
curl -XPUT 'http://localhost:9200/test/user/84047?op_type=create' -d '{"full_name":"Roger Sand"}'
curl -XPUT 'http://localhost:9200/test/user/84048?op_type=create' -d '{"full_name":"Roger Gilbert"}'
curl -XPUT 'http://localhost:9200/test/user/84049?op_type=create' -d '{"full_name":"Cindy Sand"}'
curl -XPUT 'http://localhost:9200/test/user/84050?op_type=create' -d '{"full_name":"Cindy Gilbert"}'
curl -XPUT 'http://localhost:9200/test/user/84051?op_type=create' -d '{"full_name":"Jean-Roger Sands"}'
curl -XPUT 'http://localhost:9200/test/user/84052?op_type=create' -d '{"full_name":"Sand Roger"}'
curl -XPOST 'http://localhost:9200/test/_refresh' 
curl -XPOST 'http://localhost:9200/test/user/_search?pretty' -d '{"query":{"match":{"full_name":"Roger Sand"}}}'


curl -XDELETE 'http://localhost:9200/test'
curl -XPUT 'http://localhost:9200/test'
curl -XPOST 'http://localhost:9200/test/_refresh'
curl -XPUT 'http://localhost:9200/test/user/84046?op_type=create' -d '{"full_name":"Roger Sand"}'
curl -XPUT 'http://localhost:9200/test/user/84047?op_type=create' -d '{"full_name":"Roger Gilbert"}'
curl -XPUT 'http://localhost:9200/test/user/84048?op_type=create' -d '{"full_name":"Cindy Sand"}'
curl -XPUT 'http://localhost:9200/test/user/84049?op_type=create' -d '{"full_name":"Cindy Gilbert"}'
curl -XPUT 'http://localhost:9200/test/user/84050?op_type=create' -d '{"full_name":"Jean-Roger Sands"}'
curl -XPUT 'http://localhost:9200/test/user/84051?op_type=create' -d '{"full_name":"Sand Roger"}'
curl -XPOST 'http://localhost:9200/test/_refresh'
curl -XPOST 'http://localhost:9200/test/user/_search?pretty' -d '{"query":{"match":{"full_name":"Roger Sand"}}}'