Elasticsearch of routing (routing)

routing

　　The main problem is the document which should be stored in the slice

　　The actual process is calculated according to the formula partitioned　　

1  # routing hash value of the master slice number% 
2 Shard = the hash (routing)% number_of_primary_shards
 . 3  # routing default value document _id

Custom routing

. 1 ? R1 the PUT / DOC / routing. 1 = user1
 2  {
 . 3    " title " : " On the sow prenatal care " 
. 4  }
 . 5 ? The PUT R1 / DOC / 2 routing = user1
 . 6  {
 . 7    " title " : " on the mother pig post-natal care " 
8 }

Both of these documents are allocated on a slice of

By routing query document

GET r1/doc/1?routing=user1
# 结果如下
{
  "_index" : "r1",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 3,
  "_routing" : "user1",
  "found" : true,
  "_source" : {
    "title" : " On the sow prenatal care " 
  } 
}

Find the route by value

 1 GET r1/doc/_search
 2 {
 3   "query": {
 4     "terms": {
 5       "_routing":["user1"] 
 6     }
 7   }
 8 }
 9 # 结果如下
10 {
11   "took" : 0,
12   "timed_out" : false,
13   "_shards" : {
14     "total" : 5,
15     "successful" : 5,
16     "skipped" : 0,
17     "failed" : 0
18   },
19   "hits" : {
20     "total" : 2,
21     "max_score" : 1.0,
22     "hits" : [
23       {
24         "_index" : "r1",
25         "_type" : "doc",
26         "_id" : "2",
27         "_score" : 1.0,
28         "_routing" : "user1",
29         "_source" : {
30           "title" : "论母猪的产后护理"
31         }
32       },
33       {
34         "_index" : "r1",
35         "_type" : "doc",
36         "_id" : "1",
37         "_score" : 1.0,
38         "_routing" : "user1",
39         "_source" : {
40           "title" : "        }
41"On sows prenatal care
 42       }
43     ]
44   }
45 }

Deleting a document routing will take or will not find value

DELETE r1/doc/1   
# 结果如下
{
  "_index" : "r1",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "result" : "not_found",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 2,
  "_primary_term" : 1
}


DELETE r1/doc/1?routing=user1
# 结果如下
{
  "_index" : "r1",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 2,
  "result" : "deleted",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 4,
  "_primary_term" : 1
}

Query multiple routes

? PUT r2 / DOC / 1 routing = user1 
{ 
  " title " : " Sow prenatal care with emphasis on multi-feed forage, supplemented by manual massage " 
} 

PUT r2 / DOC / 2 routing =? User2 
{ 
  " title " : " Mother pigs post-natal care focusing on mother and child feeding isolation " 
}

Seek

GET r2/doc/_search?routing=user1,user2
{
  "query": {
    "match": {
      "title": "母猪"
    }
  }
}
# 结果如下
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 2,
    "successful" : 2,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 2,
    "max_score" : 0.68324494,
    "hits" : [
      {
        "_index" : "r2",
        "_type" : "doc",
        "_id" : "2",
        "_score" : .68324494 ,
         " _routing " : " user2 " ,
         " _Source " : {
           " title " : " sow post-natal care focusing on mother and child feeding isolation " 
        } 
      }, 
      { 
        " _index " : " r2 " ,
         " _type " : " DOC " ,
         " _id " : "1",
        "_score " : 0.5753642 ,
         " _routing " : " user1 " ,
         " _Source " : {
           " title " : " Sow prenatal care with emphasis on multi-feed forage, supplemented by manual massage " 
        } 
      } 
    ] 
  } 
}

Forget process routing (cause the document to be indexed in multiple parts)

? R3 the PUT / DOC / routing. 1 = U1 
{ 
  " title " : " piglets very cute " 
} 

the PUT R3 / DOC / 2 
{ 
  " title " : " and then a dish is cute " 
}

Inquire

GET r3/doc/_search
{
  "query": {
    "terms": {
      "_routing":["u1"]
    }
  }
}
# 结果如下
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "r3",
        "_type" : "doc",
        "_id" : "1",
        "_score": 1.0 ,
         " _routing " : " U1 " ,
         " _Source " : {
           " title " : " piglets very cute " 
        } 
      } 
    ] 
  } 
}

Document 2 according to the general query, so two documents must be returned to avoid a situation like this

# The following is the written version 6.5.4 
PUT r4 
{ 
  " Mappings " : {
     " DOC " : {
       " _routing " : {
         " required " : to true 
      } 
    } 
  } 
} 
# The following is the wording of official documents after 7.0 
PUT my_index2 
{ 
  " Mappings " : { 
     " _ usting " : { 
       " required " : to true 
    } 
  } 
}

During the operation of the document when it is necessary to bring the routing parameters

R4 PUT / DOC / 1 ? Routing parameters 
{ 
  " title " : " Sows not pregnant how to do? " 
}