问题是关于Elasticsearch 1.x
设置"doc_values": true
的文档says应该足以使用基于磁盘的fielddata。像这样:
"string_field": {
"doc_values": true,
"type": "string",
"index": "not_analyzed"
}
但是,也可以将doc_values
设置为fielddata格式:
"string_field": {
"type": "string",
"index": "not_analyzed",
"fielddata": {
"format": "doc_values"
}
}
所以我的问题是:
这两种方法基本上是一回事吗?
如果没有,有什么区别,他们应该同时使用(我检查过,他们可以,但我不知道是否有任何实际好处)?
答案 0 :(得分:1)
"fields don't need to be indexed to enable doc values" means you can have "index": "no"
, for example:
"my_field": {
"type": "string",
"index": "no",
"fielddata": {
"format": "doc_values"
}
}
If you want to change format to doc_values, you need to update mapping and reindex your data.