The index_options parameter controls what information is added to the inverted index, for search and highlighting purposes. It accepts the following settings:
| docs
|
Only the doc number is indexed. Can answer the question Does this term exist in this field? |
| freqs
|
Doc number and term frequencies are indexed. Term frequencies are used to score repeated terms higher than single terms. |
| positions
|
Doc number, term frequencies, and term positions (or order) are indexed. Positions can be used for proximity or phrase queries. |
| offsets
|
Doc number, term frequencies, positions, and start and end character offsets (which map the term back to the original string) are indexed. Offsets are used by the postings highlighter. |
Analyzed string fields use positions as the default, and all other fields use docs as the default.
PUT my_index
{
"mappings": { "my_type": { "properties": { "text": { "type": "text", "index_options": "offsets" } } } } } PUT my_index/my_type/1 { "text": "Quick brown fox" } GET my_index/_search { "query": { "match": { "text": "brown fox" } }, "highlight": { "fields": { "text": {} } } }
| ![]()
|
The text field will use the postings highlighter by default because offsets are indexed. |
转自：https://www.elastic.co/guide/en/elasticsearch/reference/current/index-options.html
注意：ES2.41里没有text这个type
curl -XPUT 'http://localhost:9200/hec_test2' -d '
{
"mappings": {
"hec_type2": {
"properties": {
"filed-0": {
"type": "string",
"index_options": "docs"
},
"filed-1": {
"type": "string",
"index_options": "docs"
}
}
}
}
}
'
比较测试：
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可以比默认的节省10+%的存储空间！
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本文转自张昺华-sky博客园博客，原文链接：http://www.cnblogs.com/bonelee/p/6397522.html，如需转载请自行联系原作者
