# How to reindex , with multiple \_id in index **URL:** \ **Category:** Elasticsearch\ **Created:** [January 10, 2018, 1:26pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879 "2018-01-10T13:26:47Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 1:26pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/1 "2018-01-10T13:26:47Z")
Hi, I have Index with more than one document and wanted to reindex but while reindexing wanted to change the \_id field of each document in destination index. Followed[this](https://discuss.elastic.co/t/how-to-change-a-documents--id-during-a-reindex/76132) but it is for one index. How to do that? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 1:28pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/2 "2018-01-10T13:28:11Z")
I'm unsure but may be you can modify `ctx._source._index`? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 1:30pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/3 "2018-01-10T13:30:29Z")
Thanks for your suggestion but wanted to modify the \_id not \_index. For one document we can change the \_id while reindexing and my case is for multiple docs ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 1:49pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/4 "2018-01-10T13:49:42Z")
So I don't understand. Why `ctx._source._id` does not work in your case? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 2:10pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/5 "2018-01-10T14:10:21Z")
I am using command to reindex: ```auto curl -XPOST 'localhost:9200/_reindex?pretty' -H 'Content-Type: application/json' -d' { "source": { "index": "megacorp" }, "dest": { "index": "tempindex" }, "script" : { "inline": "ctx._id= 12345" } } ' ``` After successful execution it copies the megacorp/type/1( where 1 is \_id ) document to tempindex/type/1234. As I could not found to give the source \_id field in command so by default it is taking first document in this case \_id =1 and copies the document in the destination \_id =1234. As source index megacorp contains many documents but it copies only one to tempindex. Is there any way to give the source \_id while reindexing? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 2:26pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/6 "2018-01-10T14:26:18Z")
> Is there any way to give the source \_id while reindexing? Which value you want to set the id to? Is that from a field which is available within your document? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 3:13pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/7 "2018-01-10T15:13:23Z")
"\_index" : "megacorp1", "\_type" : "employee", "\_id" : "2", "\_version" : 1, "result" : "created", "\_shards" : { "total" : 2, "successful" : 1, "failed" : 0 I want to give all \_id value from existing document as a source and a destination \_id's for new index. As given above \_id is 2 so in new index i want to copy this document to other index suppose 12 like this while reindexing wanted to copy document from source index to destination index at different \_id ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 3:39pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/8 "2018-01-10T15:39:23Z")
So if I understand correctly you have a document which coordinate is: ``` source/doc/1 ``` And you want to reindex it as ``` destination/doc/12 ``` Do I understand correctly the requirement? If so, tell me how you compute `12` from the data you have in document `1`. Where this `12` number is coming from? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 3:52pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/9 "2018-01-10T15:52:16Z")
Yes U have understood the requirement correctly David. As per my project requirement I need to copy the document to different id in destination index ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 4:08pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/10 "2018-01-10T16:08:47Z")
> [@dadoonet](#): > > If so, tell me how you compute 12 from the data you have in document 1. Where this 12 number is coming from? Could you answer that ^^^ then? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 4:12pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/11 "2018-01-10T16:12:13Z")
```auto curl -XPOST 'localhost:9200/_reindex?pretty' -H 'Content-Type: application/json' -d' { "source": { "index": "megacorp" }, "dest": { "index": "tempindex" }, "script" : { "inline": "ctx._id= 12345" } } ' ``` As in this it is copying \_id 1 data to 12345 at destination similarly as per requirement I have to insert at any \_id in destination. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 4:28pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/12 "2018-01-10T16:28:17Z")
What is "any `_id`"? Again, how do you compute this `12345`? Is it the current `_id` of the document multiplied by `12345`? What is the rule to get that number? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 4:32pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/13 "2018-01-10T16:32:47Z")
Yes it is multiplied by 12345. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [January 10, 2018, 4:35pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/14 "2018-01-10T16:35:22Z")
Then can you write: `ctx._id = ctx._id * 12345`? ---
**Author:** ![Abhishekh](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Abhishekh](https://discuss.elastic.co/u/Abhishekh)\ **Post date:** [January 10, 2018, 5:01pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/16 "2018-01-10T17:01:44Z")
Thanks David for your suggestion, My problem got resolved. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 7, 2018, 5:01pm UTC](https://discuss.elastic.co/t/how-to-reindex-with-multiple-id-in-index/114879/17 "2018-02-07T17:01:48Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.