搜索推荐

搜索推荐：

 一、Completion Suggester（为主）

Completion Suggester会被构建成FST对象，缓存在RAM中，查询速度会变快

 1 #complate suggester
 2 DELETE suggest_carinfo
 3 PUT suggest_carinfo
 4 {
 5   "mappings": {
 6     "properties": {
 7         "title": {
 8           "type": "text",
 9           "analyzer": "ik_max_word",
10           "fields": {
11             "suggest": {
12               "type": "completion",
13               "analyzer": "ik_max_word"
14             }
15           }
16         },
17         "content": {
18           "type": "text",
19           "analyzer": "ik_max_word"
20         }
21       }
22   }
23 }
24 
25 
26 
27 POST _bulk
28 {"index":{"_index":"suggest_carinfo","_id":1}}
29 {"title":"宝马X5 两万公里准新车","content":"这里是宝马X5图文描述"}
30 {"index":{"_index":"suggest_carinfo","_id":2}}
31 {"title":"宝马5系","content":"这里是奥迪A6图文描述"}
32 {"index":{"_index":"suggest_carinfo","_id":3}}
33 {"title":"宝马3系","content":"这里是奔驰图文描述"}
34 {"index":{"_index":"suggest_carinfo","_id":4}}
35 {"title":"奥迪Q5 两万公里准新车","content":"这里是宝马X5图文描述"}
36 {"index":{"_index":"suggest_carinfo","_id":5}}
37 {"title":"奥迪A6 无敌车况","content":"这里是奥迪A6图文描述"}
38 {"index":{"_index":"suggest_carinfo","_id":6}}
39 {"title":"奥迪双钻","content":"这里是奔驰图文描述"}
40 {"index":{"_index":"suggest_carinfo","_id":7}}
41 {"title":"奔驰AMG 两万公里准新车","content":"这里是宝马X5图文描述"}
42 {"index":{"_index":"suggest_carinfo","_id":8}}
43 {"title":"奔驰大G 无敌车况","content":"这里是奥迪A6图文描述"}
44 {"index":{"_index":"suggest_carinfo","_id":9}}
45 {"title":"奔驰C260","content":"这里是奔驰图文描述"}
46 {"index":{"_index":"suggest_carinfo","_id":10}}
47 {"title":"nir奔驰C260","content":"这里是奔驰图文描述"}
48 
49 
50 GET suggest_carinfo/_search?pretty
51 {
52   "suggest": {
53     "car_suggest": {
54       "prefix": "奥迪",
55       "completion": {
56         "field": "title.suggest"
57       }
58     }
59   }
60 }
61 
62 #1：内存代价太大，原话是：性能高是通过大量的内存换来的
63 #2：只能前缀搜索,假如用户输入的不是前缀 召回率可能很低
64 
65 POST suggest_carinfo/_search
66 {
67   "suggest": {
68     "car_suggest": {
69       "prefix": "宝马5系",
70       "completion": {
71         "field": "title.suggest",
72         "skip_duplicates":true,
73         "fuzzy": {
74           "fuzziness": 2
75         }
76       }
77     }
78   }
79 }
80 GET suggest_carinfo/_doc/10
81 GET _analyze
82 {
83   "analyzer": "ik_max_word",
84   "text": ["奔驰AMG 两万公里准新车"]
85 }
86 
87 POST suggest_carinfo/_search
88 {
89   "suggest": {
90     "car_suggest": {
91       "regex": "nir",
92       "completion": {
93         "field": "title.suggest",
94         "size": 10
95       }
96     }
97   }
98 }