[[scroll-api]]
=== Scroll API
++++
<titleabbrev>Scroll</titleabbrev>
++++

IMPORTANT: We no longer recommend using the scroll API for deep pagination. If
you need to preserve the index state while paging through more than 10,000 hits,
use the <<search-after,`search_after`>> parameter with a point in time (PIT).

Retrieves the next batch of results for a <<scroll-search-results,scrolling
search>>.

////
[source,console]
--------------------------------------------------
GET /_search?scroll=1m
{
  "size": 1,
  "query": {
    "match_all": {}
  }
}
--------------------------------------------------
// TEST[setup:my_index]
////

[source,console]
--------------------------------------------------
GET /_search/scroll
{
  "scroll_id" : "DXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAD4WYm9laVYtZndUQlNsdDcwakFMNjU1QQ=="
}
--------------------------------------------------
// TEST[continued]
// TEST[s/DXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAD4WYm9laVYtZndUQlNsdDcwakFMNjU1QQ==/$body._scroll_id/]

[[scroll-api-request]]
==== {api-request-title}

`GET /_search/scroll/<scroll_id>`
deprecated:[7.0.0]

`GET /_search/scroll`

`POST /_search/scroll/<scroll_id>`
deprecated:[7.0.0]

`POST /_search/scroll`

[[scroll-api-api-prereqs]]
==== {api-prereq-title}

* If the {es} {security-features} are enabled, you must have the `read`
<<privileges-list-indices,index privilege>> for the target data stream, index,
or alias.

[[scroll-api-desc]]
==== {api-description-title}

You can use the scroll API to retrieve large sets of results from a single
<<scroll-search-results,scrolling search>> request.

The scroll API requires a scroll ID. To get a scroll ID, submit a
<<search-search,search API>> request that includes an argument for the
<<search-api-scroll-query-param,`scroll` query parameter>>. The `scroll`
parameter indicates how long {es} should retain the
<<scroll-search-context,search context>> for the request.

The search response returns a scroll ID in the `_scroll_id` response body
parameter. You can then use the scroll ID with the scroll API to retrieve the
next batch of results for the request. If the {es} {security-features} are enabled,
the access to the results of a specific scroll ID is restricted to
<<can-access-resources-check,the user or API key that submitted the search>>.

You can also use the scroll API to specify a new `scroll` parameter that extends
or shortens the retention period for the search context.

See <<scroll-search-results>>.

IMPORTANT: Results from a scrolling search reflect the state of the index at the
time of the initial search request. Subsequent indexing or document changes only
affect later search and scroll requests.

[[scroll-api-path-params]]
==== {api-path-parms-title}

`<scroll_id>`::
deprecated:[7.0.0]
(Optional, string)
Scroll ID of the search.
+
IMPORTANT: Scroll IDs can be long. We recommend only specifying scroll IDs using
the <<scroll-api-scroll-id-param,`scroll_id` request body parameter>>.

[[scroll-api-query-params]]
==== {api-query-parms-title}

`scroll`::
(Optional, <<time-units,time value>>)
Period to retain the <<scroll-search-context,search context>> for scrolling. See
<<scroll-search-results>>.
+
This value overrides the duration set by the original search API request's
`scroll` parameter.
+
By default, this value cannot exceed `1d` (24 hours). You can change
this limit using the `search.max_keep_alive` cluster-level setting.
+
IMPORTANT: You can also specify this value using the `scroll` request body
parameter. If both parameters are specified, only the query parameter is used.

`scroll_id`::
deprecated:[7.0.0]
(Optional, string)
Scroll ID for the search.
+
IMPORTANT: Scroll IDs can be long. We recommend only specifying scroll IDs using
the <<scroll-api-scroll-id-param,`scroll_id` request body parameter>>.

`rest_total_hits_as_int`::
(Optional, Boolean)
If `true`, the API response's `hit.total` property is returned as an integer.
If `false`, the API response's `hit.total` property is returned as an object.
Defaults to `false`.

[role="child_attributes"]
[[scroll-api-request-body]]
==== {api-request-body-title}

`scroll`::
(Optional, <<time-units,time value>>)
Period to retain the <<scroll-search-context,search context>> for scrolling. See
<<scroll-search-results>>.
+
This value overrides the duration set by the original search API request's
`scroll` parameter.
+
By default, this value cannot exceed `1d` (24 hours). You can change
this limit using the `search.max_keep_alive` cluster-level setting.
+
IMPORTANT: You can also specify this value using the `scroll` query
parameter. If both parameters are specified, only the query parameter is used.

[[scroll-api-scroll-id-param]]
`scroll_id`::
(Required, string)
Scroll ID for the search.

[role="child_attributes"]
[[scroll-api-response-body]]
==== {api-response-body-title}

The scroll API returns the same response body as the search API. See the search
API's <<search-api-response-body,response body parameters>>.
