# \#reindex **URL:** https://discuss.elastic.co/tag/reindex/84.md [Latest](https://discuss.elastic.co/latest.md) · [Categories](https://discuss.elastic.co/categories.md) · [Tags](https://discuss.elastic.co/tags.md) --- ## [The proper way to reindex a data stream index](https://discuss.elastic.co/t/the-proper-way-to-reindex-a-data-stream-index/371102)
**Author:** [@Dave\_Houser](https://discuss.elastic.co/u/Dave_Houser)\ **Replies:** 2\ **Last updated:** [June 25, 2026, 2:03pm UTC](https://discuss.elastic.co/t/the-proper-way-to-reindex-a-data-stream-index/371102 "2026-06-25T14:03:56Z")
I have run into an issue with mappings in an data stream index. Can someone help me out? I am getting data type conflicts between the new mapping and old mapping of some fields. What I want to do is just remove the mappi… --- ## [Need Help: Date-wise Index Creation with Application Using Built-in Elasticsearch and Static Index Name](https://discuss.elastic.co/t/need-help-date-wise-index-creation-with-application-using-built-in-elasticsearch-and-static-index-name/386007)
**Author:** [@Shubham\_Khodpe](https://discuss.elastic.co/u/Shubham_Khodpe)\ **Replies:** 6\ **Last updated:** [May 20, 2026, 1:24pm UTC](https://discuss.elastic.co/t/need-help-date-wise-index-creation-with-application-using-built-in-elasticsearch-and-static-index-name/386007 "2026-05-20T13:24:00Z")
\## Environment Details ### Elasticsearch (self-managed cluster on AWS) 4 Data Nodes (1 TB each) 2 Master Nodes Daily data ingestion around 300 GB (without replica) and approximately 600 GB with 1 replica Data source is… --- ## [Is reindexing much heavier than initial indexing?](https://discuss.elastic.co/t/is-reindexing-much-heavier-than-initial-indexing/385177)
**Author:** [@some](https://discuss.elastic.co/u/some)\ **Replies:** 0\ **Last updated:** [February 24, 2026, 11:46am UTC](https://discuss.elastic.co/t/is-reindexing-much-heavier-than-initial-indexing/385177 "2026-02-24T11:46:39Z")
I have single server with ES 9.2.5. It has 40cores/256GB RAM/12TB of SSD. Thers are 2 aliases, ILM is rotating indices at 200GB (10 shards per index). Everything works fine in terms of indexing/search speed, but I can… --- ## [Persistent Reindex Failure from Source-Only Snapshot: unexpected docvalues type NONE for field '\_ignored' error](https://discuss.elastic.co/t/persistent-reindex-failure-from-source-only-snapshot-unexpected-docvalues-type-none-for-field-ignored-error/383178)
**Author:** [@Rizaldi\_Sanjaya](https://discuss.elastic.co/u/Rizaldi_Sanjaya)\ **Replies:** 2\ **Last updated:** [November 21, 2025, 4:14am UTC](https://discuss.elastic.co/t/persistent-reindex-failure-from-source-only-snapshot-unexpected-docvalues-type-none-for-field-ignored-error/383178 "2025-11-21T04:14:38Z")
Hello, I am attempting to restore a data stream from a source-only snapshot and then reindex it into a new, functional data stream, as required by the source-only documentation. The restore operation completes successf… --- ## [How to reindex a data stream into another data stream?](https://discuss.elastic.co/t/how-to-reindex-a-data-stream-into-another-data-stream/383131)
**Author:** [@dot-mike](https://discuss.elastic.co/u/dot-mike)\ **Replies:** 2\ **Last updated:** [November 3, 2025, 2:02pm UTC](https://discuss.elastic.co/t/how-to-reindex-a-data-stream-into-another-data-stream/383131 "2025-11-03T14:02:06Z")
Hi community, I’m trying to reindex data from one data stream to another. Basically, I want data from this data stream logs-syslog.myproduct.logs to go into logs-syslog.myproduct\_logs-default The issue is that when th… --- ## [How to balance search relevance with lots of images in Elasticsearch?](https://discuss.elastic.co/t/how-to-balance-search-relevance-with-lots-of-images-in-elasticsearch/381905)
**Author:** [@jessicakaren907](https://discuss.elastic.co/u/jessicakaren907)\ **Replies:** 1\ **Last updated:** [September 13, 2025, 12:28am UTC](https://discuss.elastic.co/t/how-to-balance-search-relevance-with-lots-of-images-in-elasticsearch/381905 "2025-09-13T00:28:04Z")
Quick question for the community: has anyone here tried indexing pages that are heavy on visuals? I’ve seen cases where full-text search works fine for pure articles, but when the page has lots of images + short descrip… --- ## [Reindex while docs are added / updated in source index? Online reindex?](https://discuss.elastic.co/t/reindex-while-docs-are-added-updated-in-source-index-online-reindex/380266)
**Author:** [@buitcj](https://discuss.elastic.co/u/buitcj)\ **Replies:** 1\ **Last updated:** [July 18, 2025, 6:52pm UTC](https://discuss.elastic.co/t/reindex-while-docs-are-added-updated-in-source-index-online-reindex/380266 "2025-07-18T18:52:29Z")
From the docs I don't see any guarantees about what happens with new and updated docs in the source index. Might newly-added docs get left out of the reindex process? Might an updated doc in the rebuilt index not show t… --- ## [Range based join between two indices?](https://discuss.elastic.co/t/range-based-join-between-two-indices/379545)
**Author:** [@echan23](https://discuss.elastic.co/u/echan23)\ **Replies:** 1\ **Last updated:** [June 26, 2025, 6:11pm UTC](https://discuss.elastic.co/t/range-based-join-between-two-indices/379545 "2025-06-26T18:11:35Z")
I have two indices: IndexA with field Date\_time Index B with fields MoveInDateTime and MoveOutDateTime I want to join them on MoveInDateTime \<= Date\_time \<= MoveOutDateTime. Is this possible in Elasticsearch? If not,… --- ## [Unable to delete documents from full index](https://discuss.elastic.co/t/unable-to-delete-documents-from-full-index/379266)
**Author:** [@fgjensen](https://discuss.elastic.co/u/fgjensen)\ **Replies:** 17\ **Last updated:** [June 20, 2025, 5:37am UTC](https://discuss.elastic.co/t/unable-to-delete-documents-from-full-index/379266 "2025-06-20T05:37:42Z")
Hi; I have an application with one build-in Elasticsearch node used for collecting log events into 3 indices. The application is deployed at several sites. At some point in the future the implementation is going to be … --- ## [Reindexing many indexes failing. Please help!](https://discuss.elastic.co/t/reindexing-many-indexes-failing-please-help/378696)
**Author:** [@kk123](https://discuss.elastic.co/u/kk123)\ **Replies:** 8\ **Last updated:** [May 30, 2025, 3:16pm UTC](https://discuss.elastic.co/t/reindexing-many-indexes-failing-please-help/378696 "2025-05-30T15:16:22Z")
Hi, I am trying to reindex many indices in to one ILM based alias/indices... However I get the below error, smallish DB at 150GB but many indices 3000 (hence the re-structuring) First it complained about too many scrol… --- ## [Bulk Ingester flush timing issues with wait\_for Refresh Policy](https://discuss.elastic.co/t/bulk-ingester-flush-timing-issues-with-wait-for-refresh-policy/376122)
**Author:** [@mattar](https://discuss.elastic.co/u/mattar)\ **Replies:** 5\ **Last updated:** [March 21, 2025, 9:47am UTC](https://discuss.elastic.co/t/bulk-ingester-flush-timing-issues-with-wait-for-refresh-policy/376122 "2025-03-21T09:47:24Z")
Hello everyone, I’m working with the bulk ingester in Elastic 8.15.3 and encountering some timing issues with flush. I configured the bulk ingester with a refresh policy set to wait\_for in the global settings, expecting… --- ## [Reindex stops stops after 1000 docs](https://discuss.elastic.co/t/reindex-stops-stops-after-1000-docs/374779)
**Author:** [@honungsburk](https://discuss.elastic.co/u/honungsburk)\ **Replies:** 3\ **Last updated:** [February 20, 2025, 7:30am UTC](https://discuss.elastic.co/t/reindex-stops-stops-after-1000-docs/374779 "2025-02-20T07:30:07Z")
Hello! I currently have 1 index filled with about 500k documents that I want to reindex into another index where I have added a semantic text search field. It is the most basic kind that uses the built in stuff in Elast… --- ## [After upgrading Elasticsearch from 5.3 to 5.6, do I need to reindex for schema updates](https://discuss.elastic.co/t/after-upgrading-elasticsearch-from-5-3-to-5-6-do-i-need-to-reindex-for-schema-updates/372267)
**Author:** [@Maelito](https://discuss.elastic.co/u/Maelito)\ **Replies:** 3\ **Last updated:** [December 20, 2024, 3:36pm UTC](https://discuss.elastic.co/t/after-upgrading-elasticsearch-from-5-3-to-5-6-do-i-need-to-reindex-for-schema-updates/372267 "2024-12-20T15:36:15Z")
Hello, I recently upgraded my Elasticsearch cluster from version 5.3 to 5.6. I’m now updating my schema to address deprecations introduced in 5.6. Below is the diff of the schema updates I intend to make: { "properti… --- ## [How to migrate index A to index B in Elasticsearch without stopping writes to index A?](https://discuss.elastic.co/t/how-to-migrate-index-a-to-index-b-in-elasticsearch-without-stopping-writes-to-index-a/372198)
**Author:** [@WangXiang727](https://discuss.elastic.co/u/WangXiang727)\ **Replies:** 4\ **Last updated:** [December 19, 2024, 7:38am UTC](https://discuss.elastic.co/t/how-to-migrate-index-a-to-index-b-in-elasticsearch-without-stopping-writes-to-index-a/372198 "2024-12-19T07:38:07Z")
I'm using Elasticsearch 7.10.0 and need to migrate data from index A to a new index B without interrupting write operations to index A. I want to achieve zero downtime during this migration and to migrate both the existi… --- ## [Roll over indices - mapping updates and reindexing requirements](https://discuss.elastic.co/t/roll-over-indices-mapping-updates-and-reindexing-requirements/371784)
**Author:** [@seshug](https://discuss.elastic.co/u/seshug)\ **Replies:** 1\ **Last updated:** [December 12, 2024, 2:16pm UTC](https://discuss.elastic.co/t/roll-over-indices-mapping-updates-and-reindexing-requirements/371784 "2024-12-12T14:16:08Z")
Question, how do we better handle the rollover indices along with rollover alias when there is a requirement to update the mappings on the indices. We have a scenario where we implemented a rollover indices for one of t… --- ## [Combine two index in one using Kibana](https://discuss.elastic.co/t/combine-two-index-in-one-using-kibana/370673)
**Author:** [@amity.nidhi](https://discuss.elastic.co/u/amity.nidhi)\ **Replies:** 9\ **Last updated:** [December 2, 2024, 2:46am UTC](https://discuss.elastic.co/t/combine-two-index-in-one-using-kibana/370673 "2024-12-02T02:46:15Z")
Hello, I have a requirement to combine two index in Elasticsearch on basis of below criteria - index1: Record1: {"service": "abc", "opened\_at":"2024-11-04T16:48:04.000Z","closed\_at":"2024-11-05T18:00:10.000Z") Record… --- ## [Reindexing an index with 3000 fields](https://discuss.elastic.co/t/reindexing-an-index-with-3000-fields/370321)
**Author:** [@PopisanaOgrada](https://discuss.elastic.co/u/PopisanaOgrada)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 2:15pm UTC](https://discuss.elastic.co/t/reindexing-an-index-with-3000-fields/370321 "2024-11-11T14:15:36Z")
Hello! Is it possible to reindex an index with 3000 fields (index.mapping.total\_fields.limit is already set to 3000) to an index with default index.mapping.total\_fields.limit of 1000? If yes, what are all the possible … --- ## [Reindexing a datastream after changed mappings : best practice?](https://discuss.elastic.co/t/reindexing-a-datastream-after-changed-mappings-best-practice/370275)
**Author:** [@gpineda\_dev](https://discuss.elastic.co/u/gpineda_dev)\ **Replies:** 0\ **Last updated:** [November 10, 2024, 1:04am UTC](https://discuss.elastic.co/t/reindexing-a-datastream-after-changed-mappings-best-practice/370275 "2024-11-10T01:04:13Z")
Before writing this post, I started by gathering available information on this platform, official documentation, related articles. Examples to reindex basic indices are easy to find but when it comes to datastream, then… --- ## [Migrating indices from one machine to another](https://discuss.elastic.co/t/migrating-indices-from-one-machine-to-another/369092)
**Author:** [@SamehSaeed](https://discuss.elastic.co/u/SamehSaeed)\ **Replies:** 5\ **Last updated:** [October 30, 2024, 2:11pm UTC](https://discuss.elastic.co/t/migrating-indices-from-one-machine-to-another/369092 "2024-10-30T14:11:58Z")
Hello, I'm trying to migrate indices from a windows machine to a linux machine. For security reasons, I cannot use anything related to cloud. Is there a way to migrate indices using local file system? I tried copying th… --- ## [How to reindex an index that is being actively modified](https://discuss.elastic.co/t/how-to-reindex-an-index-that-is-being-actively-modified/369745)
**Author:** [@PopisanaOgrada](https://discuss.elastic.co/u/PopisanaOgrada)\ **Replies:** 0\ **Last updated:** [October 29, 2024, 2:52pm UTC](https://discuss.elastic.co/t/how-to-reindex-an-index-that-is-being-actively-modified/369745 "2024-10-29T14:52:34Z")
Hello! I need to reindex an index that is being actively modified (docs added and updated) and searched via an alias. What is the best way to do that while minimizing the data gap in the new index due to the old index b… --- ## [Reindexing due to index incompatibility gone wrong, can't find task result](https://discuss.elastic.co/t/reindexing-due-to-index-incompatibility-gone-wrong-cant-find-task-result/369675)
**Author:** [@PopisanaOgrada](https://discuss.elastic.co/u/PopisanaOgrada)\ **Replies:** 3\ **Last updated:** [October 28, 2024, 1:38pm UTC](https://discuss.elastic.co/t/reindexing-due-to-index-incompatibility-gone-wrong-cant-find-task-result/369675 "2024-10-28T13:38:41Z")
Hello! Just for context, my mission is to “migrate” a cluster from ES 7.7.1 to OS 2.15 via snapshot restore. The main issue I encountered is the index version incompatibility, because several indices were created in ES … --- ## [My reindex task disappears somehow after it is created](https://discuss.elastic.co/t/my-reindex-task-disappears-somehow-after-it-is-created/367198)
**Author:** [@jdhao](https://discuss.elastic.co/u/jdhao)\ **Replies:** 0\ **Last updated:** [September 26, 2024, 3:42pm UTC](https://discuss.elastic.co/t/my-reindex-task-disappears-somehow-after-it-is-created/367198 "2024-09-26T15:42:40Z")
Hi, I am using Elasticsearch cluster from the Elastic cloud. The version is 8.10. I have this strange issue occured. We use the reindex API with wait\_for\_completion=False to create a reindex task. In the re… --- ## [Rollover action during a reindex](https://discuss.elastic.co/t/rollover-action-during-a-reindex/366821)
**Author:** [@brandon.n](https://discuss.elastic.co/u/brandon.n)\ **Replies:** 4\ **Last updated:** [September 19, 2024, 8:39pm UTC](https://discuss.elastic.co/t/rollover-action-during-a-reindex/366821 "2024-09-19T20:39:54Z")
Hello, Currently working on reindexing an old index with a massive 170ishGB single primary shard into a new datastream index, with an ILM policy of 30GB/30D. We configured for 8 primary, 1 replica, but currently the ro… --- ## [Reindex API does not complete the re-indexing](https://discuss.elastic.co/t/reindex-api-does-not-complete-the-re-indexing/366389)
**Author:** [@abhadauria](https://discuss.elastic.co/u/abhadauria)\ **Replies:** 4\ **Last updated:** [September 13, 2024, 11:19am UTC](https://discuss.elastic.co/t/reindex-api-does-not-complete-the-re-indexing/366389 "2024-09-13T11:19:52Z")
using ES version 7.17, after triggering the re-index API from query node, it stops re-indexing after some time and does not complete the re-indexing of all the docs in the source index, eg, we have ~110 million docs in t… --- ## [Unable to use automatic slicing in reindex API](https://discuss.elastic.co/t/unable-to-use-automatic-slicing-in-reindex-api/364378)
**Author:** [@abhadauria](https://discuss.elastic.co/u/abhadauria)\ **Replies:** 2\ **Last updated:** [August 13, 2024, 8:12am UTC](https://discuss.elastic.co/t/unable-to-use-automatic-slicing-in-reindex-api/364378 "2024-08-13T08:12:00Z")
We are re-indexing data in ES cluster using \_reindex API ES version 7.17. We want to leverage automated slicing to finish the process sooner as we have really large index with doc count ~150 million. We were following … --- ## [Data for the index is stored in only one shard](https://discuss.elastic.co/t/data-for-the-index-is-stored-in-only-one-shard/364613)
**Author:** [@abhadauria](https://discuss.elastic.co/u/abhadauria)\ **Replies:** 1\ **Last updated:** [August 8, 2024, 2:21pm UTC](https://discuss.elastic.co/t/data-for-the-index-is-stored-in-only-one-shard/364613 "2024-08-08T14:21:04Z")
I am using ES version 7.17, I have a doubt that my index is having settings that it is associated with 100 shards with replication of 2, however all the data for the index is getting stored in only 1 shard. Please let … --- ## [Cutoff data from source index to destination index](https://discuss.elastic.co/t/cutoff-data-from-source-index-to-destination-index/364333)
**Author:** [@abhadauria](https://discuss.elastic.co/u/abhadauria)\ **Replies:** 1\ **Last updated:** [August 4, 2024, 2:15pm UTC](https://discuss.elastic.co/t/cutoff-data-from-source-index-to-destination-index/364333 "2024-08-04T14:15:49Z")
We are re-indexing data in ES cluster 7.17 from a live source index to newly created target index, is there a way to copy the entire data till the endtime of re-indexing API? so that while switching to the new index all … --- ## [How to remove dynamic field from mapping with Elastic Reindex API](https://discuss.elastic.co/t/how-to-remove-dynamic-field-from-mapping-with-elastic-reindex-api/363598)
**Author:** [@sedwardsgt](https://discuss.elastic.co/u/sedwardsgt)\ **Replies:** 1\ **Last updated:** [July 24, 2024, 8:35am UTC](https://discuss.elastic.co/t/how-to-remove-dynamic-field-from-mapping-with-elastic-reindex-api/363598 "2024-07-24T08:35:41Z")
We have a dynamic field defined in multiple indexes that is of type geo\_shape, and uses the points\_only param. Due to a) the deprecation of points\_only in version 7.x, and b) the fact that we don't use that field any mor… --- ## [NO rollover info found for an index with rollover target after reindexing](https://discuss.elastic.co/t/no-rollover-info-found-for-an-index-with-rollover-target-after-reindexing/362209)
**Author:** [@kriti\_dabas](https://discuss.elastic.co/u/kriti_dabas)\ **Replies:** 0\ **Last updated:** [June 28, 2024, 12:20pm UTC](https://discuss.elastic.co/t/no-rollover-info-found-for-an-index-with-rollover-target-after-reindexing/362209 "2024-06-28T12:20:36Z")
For resolving mapping conflict, I was performing reindexing for log-llb index. I used the following API's but I have been seeing one ilm error ever since the reindexing. PUT /log-llb-testing … --- ## [Can increase Primary Shard Count in Elasticsearch 8.2.3](https://discuss.elastic.co/t/can-increase-primary-shard-count-in-elasticsearch-8-2-3/360331)
**Author:** [@Andy\_Cong](https://discuss.elastic.co/u/Andy_Cong)\ **Replies:** 1\ **Last updated:** [May 28, 2024, 4:17am UTC](https://discuss.elastic.co/t/can-increase-primary-shard-count-in-elasticsearch-8-2-3/360331 "2024-05-28T04:17:45Z")
Hi，anybody. Question: Can increase Primary Shard Count of an existing index in Elasticsearch 8.2.3? Request：Search and indexing will all can work during the change，and if change fails, it can be rolled back smoothly… [Next page](https://discuss.elastic.co/tag/reindex/84.md?match_all_tags=true&page=1&tags%5B%5D=reindex)