How to reindex part of the data?

Elastic Stack Elasticsearch
1

I want to reindex a old index's data to a new index, but only part of the old index is useful, I don't need to reindex all of the old index's data. So, is there any way to do this?

2

What version are you on?

3

2.3.4

4

Use the _reindex API then https://www.elastic.co/guide/en/elasticsearch/reference/2.3/docs-reindex.html

5

yeah，I know use reindex, but it seems that it dosen't apply the function to fliter data , for example, the index save the data of student, I only want to reindex the boy's data to the new index.How do this?

6

Perhaps if you provide some examples of what you have tried and why they didn't appear to work we can help.

7 
POST /_reindex
{
  "source": {
    "index": "source"
    "query": {
      "match": {
        "gender": "boy"
      }
    }
  },
  "dest": {
    "index": "dest"
  }
}
8

To "_reindex" to same index, you can update your mapping and use "_update_by_query".

Example:

POST /students/_update_by_query?conflicts=proceed
{
    "query": { 
        "term": {
            "gender": "male"
        }
    }
}
9

Thank you for your reply, I have resolve this by 1222kkk 's answer.

10

thank you ,it realy help me.