# Changing mappings of some group of ids without affecting other documents **URL:** \ **Category:** Elasticsearch\ **Created:** [July 13, 2015, 5:09am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410 "2015-07-13T05:09:08Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![apanimesh061](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/apanimesh061/32/927_2.png) [@apanimesh061](https://discuss.elastic.co/u/apanimesh061)\ **Post date:** [July 13, 2015, 5:09am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/1 "2015-07-13T05:09:08Z")
I have document sets that have their own `id`s. Each document set has some documents that have their `id`s. I am trying to figure out a way to update the mapping of all documents of a set without affecting the mappings of the documents that belong to other sets. By updating I mean to add custom analyzers to the fields. There analyzers are defined in the settings. For this I got a suggestion of using shared `types` like this: ``` PUT /test_index/ { "settings": { "index.store.type": "default", "index": { "number_of_shards": 5, "number_of_replicas": 1, "refresh_interval": "60s" }, "analysis": { "filter": { "porter_stemmer_en_EN": { "type": "stemmer", "name": "porter" }, "default_stop_name_en_EN": { "type": "stop", "name": "_english_" }, "snowball_stop_words_en_EN": { "type": "stop", "stopwords_path": "snowball.stop" }, "smart_stop_words_en_EN": { "type": "stop", "stopwords_path": "smart.stop" }, "shingle_filter_en_EN": { "type": "shingle", "min_shingle_size": "2", "max_shingle_size": "2", "output_unigrams": true } } } } } PUT /my-index/document_set/_mapping { "properties": { "type": { "type": "string", "index": "not_analyzed" }, "doc_id": { "type": "string", "index": "not_analyzed" }, "plain_text": { "type": "string", "store": true, "index": "analyzed" }, "pdf_text": { "type": "attachment", "fields": { "pdf_text": { "type": "string", "store": true, "index": "analyzed" } } } } } POST /my-index/document_set/1 { "type": "d1", "doc_id": "1", "plain_text": "simple text for doc1." } POST /my-index/document_set/2 { "type": "d1", "doc_id": "2", "pdf_text": "cGRmIHRleHQgaXMgaGVyZS4=" } POST /my-index/document_set/3 { "type": "d2", "doc_id": "3", "plain_text": "simple text for doc3 in d2." } POST /my-index/document_set/4 { "type": "d2", "doc_id": "4", "pdf_text": "cGRmIHRleHQgaXMgaGVyZSBpbiBkMi4=" } // To get documents grouped by their document set ids GET /my-index/document_set/_search { "query" : { "filtered" : { "filter" : { "term" : { "type" : "d1" } } } } } ``` Now I have 4 documents where document 1,2 are in group d1 and document 3,4 are in d2. How can I update the mapping only for one group without affecting the other group's mapping. I can get the documents per group using the search query given in the end. There can 1000 of such document sets having ~10000 documents. Any help/suggestion would be appreciated. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [July 13, 2015, 6:26am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/2 "2015-07-13T06:26:45Z")
You can't because they are both of the same `_type`. You need to reindex. ---
**Author:** ![apanimesh061](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/apanimesh061/32/927_2.png) [@apanimesh061](https://discuss.elastic.co/u/apanimesh061)\ **Post date:** [July 13, 2015, 6:42am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/3 "2015-07-13T06:42:17Z")
So what should I be doing in this situation? I thought of creating aliases for each of the document sets but updating settings for any of the aliases results in update of settings for all aliases. Should I be going with creating separate index for all sets? Is there a limit to no. of indices? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [July 13, 2015, 6:46am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/4 "2015-07-13T06:46:56Z")
Again, this is because they are the same `_type`. It'd be easier to put them into their own index, especially since ES 2.0 will remove the ability to have multiple `_types` in the same index. ---
**Author:** ![apanimesh061](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/apanimesh061/32/927_2.png) [@apanimesh061](https://discuss.elastic.co/u/apanimesh061)\ **Post date:** [July 13, 2015, 6:53am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/5 "2015-07-13T06:53:52Z")
Ok I'll make separate index for all types. You mean `multi_field` will be removed in the next release? Is there any limit on the no. of indices? The application that I am working on does not a lot of query volumes/requests. So, if I keep ~10000 indices which will have a total of ~15 Million documents, is there anything I should keep in mind? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [July 13, 2015, 6:55am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/6 "2015-07-13T06:55:21Z")
That seems like a lot, you may run into issues with resources there, so you may want to refactor your doc structure. Multi field is not being removed, check out [https://www.elastic.co/blog/great-mapping-refactoring](https://www.elastic.co/blog/great-mapping-refactoring) ---
**Author:** ![apanimesh061](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/apanimesh061/32/927_2.png) [@apanimesh061](https://discuss.elastic.co/u/apanimesh061)\ **Post date:** [July 13, 2015, 6:58am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/7 "2015-07-13T06:58:33Z")
It is more like the projected no. of document sets. It might be less than that as well. What exactly do you mean by refactoring my document structure? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [July 13, 2015, 8:09am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/8 "2015-07-13T08:09:53Z")
Figure out a way to put the docs in the same index, normalise the format to remove the specific mapping or to make it applicable for multiple documents. ---
**Author:** ![apanimesh061](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/apanimesh061/32/927_2.png) [@apanimesh061](https://discuss.elastic.co/u/apanimesh061)\ **Post date:** [July 13, 2015, 8:23am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/9 "2015-07-13T08:23:30Z")
Analysis has to be done on the documents belonging to one particular set. Each set can have separate analyzers associated with it. So, I don't think normalizing would be possible. Even if I create a single index, my queries will be confined to one particular document set. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:01am UTC](https://discuss.elastic.co/t/changing-mappings-of-some-group-of-ids-without-affecting-other-documents/25410/10 "2017-07-06T00:01:55Z")