[[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-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.

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>>.
