[[reference-reindex]]

////////
===========================================================================================================================
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||        ██████╗ ███████╗ █████╗ ██████╗ ███╗   ███╗███████╗                                                            ||
||        ██╔══██╗██╔════╝██╔══██╗██╔══██╗████╗ ████║██╔════╝                                                            ||
||        ██████╔╝█████╗  ███████║██║  ██║██╔████╔██║█████╗                                                              ||
||        ██╔══██╗██╔══╝  ██╔══██║██║  ██║██║╚██╔╝██║██╔══╝                                                              ||
||        ██║  ██║███████╗██║  ██║██████╔╝██║ ╚═╝ ██║███████╗                                                            ||
||        ╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝╚═════╝ ╚═╝     ╚═╝╚══════╝                                                            ||
||                                                                                                                       ||
||                                                                                                                       ||
||    This file is autogenerated, DO NOT send pull requests that changes this file directly.                             ||
||    You should update the script that does the generation, which can be found in:                                      ||
||    https://github.com/elastic/elastic-client-generator-js                                                             ||
||                                                                                                                       ||
||    You can run the script with the following command:                                                                 ||
||       npm run elasticsearch -- --version <version>                                                                    ||
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===========================================================================================================================
////////

[discrete]
=== client.reindex

Reindex documents. Copies documents from a source to a destination. The source can be any existing index, alias, or data stream. The destination must differ from the source. For example, you cannot reindex a data stream into itself.

{ref}/docs-reindex.html[{es} documentation]

[discrete]
==== Function signature

[source,ts]
----
(ReindexRequest, options?): Promise<ReindexResponse>
----

[discrete]
===== `ReindexRequest`

[source,ts]
----
interface ReindexRequest extends <<shared-type-request-base, RequestBase>> {
  refresh?: boolean
  requests_per_second?: <<shared-type-float, float>>
  scroll?: <<shared-type-duration, Duration>>
  slices?: <<shared-type-slices, Slices>>
  timeout?: <<shared-type-duration, Duration>>
  wait_for_active_shards?: <<shared-type-wait-for-active-shards, WaitForActiveShards>>
  wait_for_completion?: boolean
  require_alias?: boolean
  conflicts?: <<shared-type-conflicts, Conflicts>>
  dest: ReindexDestination
  max_docs?: <<shared-type-long, long>>
  script?: <<shared-type-script, Script>> | string
  size?: <<shared-type-long, long>>
  source: ReindexSource
}
----

[discrete]
===== `ReindexResponse`

[source,ts]
----
interface ReindexResponse {
  batches?: <<shared-type-long, long>>
  created?: <<shared-type-long, long>>
  deleted?: <<shared-type-long, long>>
  failures?: <<shared-type-bulk-index-by-scroll-failure, BulkIndexByScrollFailure>>[]
  noops?: <<shared-type-long, long>>
  retries?: <<shared-type-retries, Retries>>
  requests_per_second?: <<shared-type-float, float>>
  slice_id?: <<shared-type-integer, integer>>
  task?: <<shared-type-task-id, TaskId>>
  throttled_millis?: <<shared-type-epoch-time, EpochTime>><<<shared-type-unit-millis, UnitMillis>>>
  throttled_until_millis?: <<shared-type-epoch-time, EpochTime>><<<shared-type-unit-millis, UnitMillis>>>
  timed_out?: boolean
  took?: <<shared-type-duration-value, DurationValue>><<<shared-type-unit-millis, UnitMillis>>>
  total?: <<shared-type-long, long>>
  updated?: <<shared-type-long, long>>
  version_conflicts?: <<shared-type-long, long>>
}
----