270 lines
9.6 KiB
Markdown
270 lines
9.6 KiB
Markdown
---
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layout: default
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title: Point in Time API
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nav_order: 58
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has_children: false
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parent: Point in Time
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---
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# Point in Time API
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Use the [Point in Time (PIT)]({{site.url}}{{site.baseurl}}/opensearch/point-in-time/) API to manage PITs.
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---
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#### Table of contents
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- TOC
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{:toc}
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---
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## Create a PIT
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Introduced 2.4
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{: .label .label-purple }
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Creates a PIT. The `keep_alive` query parameter is required; it specifies how long to keep a PIT.
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### Path and HTTP methods
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```json
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POST /<target_indexes>/_search/point_in_time?keep_alive=1h&routing=&expand_wildcards=&preference=
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```
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### Path parameters
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Parameter | Data type | Description
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:--- | :--- | :---
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target_indexes | String | The name(s) of the target index(es) for the PIT. May contain a comma-separated list or a wildcard index pattern.
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### Query parameters
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Parameter | Data type | Description
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:--- | :--- | :---
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keep_alive | Time | The amount of time to keep the PIT. Every time you access a PIT by using the Search API, the PIT lifetime is extended by the amount of time equal to the `keep_alive` parameter. Required.
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preference | String | The node or the shard used to perform the search. Optional. Default is random.
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routing | String | Specifies to route search requests to a specific shard. Optional. Default is the document's `_id`.
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expand_wildcards | String | The type of index that can match the wildcard pattern. Supports comma-separated values. Valid values are the following:<br>- `all`: Match any index or data stream, including hidden ones. <br>- `open`: Match open, non-hidden indexes or non-hidden data streams. <br>- `closed`: Match closed, non-hidden indexes or non-hidden data streams. <br>- `hidden`: Match hidden indexes or data streams. Must be combined with `open`, `closed` or both `open` and `closed`.<br>- `none`: No wildcard patterns are accepted.<br> Optional. Default is `open`.
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allow_partial_pit_creation | Boolean | Specifies whether to create a PIT with partial failures. Optional. Default is `true`.
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#### Sample request
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```json
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POST /my-index-1/_search/point_in_time?keep_alive=100m
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```
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#### Sample response
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```json
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{
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"pit_id": "o463QQEPbXktaW5kZXgtMDAwMDAxFnNOWU43ckt3U3IyaFVpbGE1UWEtMncAFjFyeXBsRGJmVFM2RTB6eVg1aVVqQncAAAAAAAAAAAIWcDVrM3ZIX0pRNS1XejE5YXRPRFhzUQEWc05ZTjdyS3dTcjJoVWlsYTVRYS0ydwAA",
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"_shards": {
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"total": 1,
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"successful": 1,
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"skipped": 0,
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"failed": 0
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},
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"creation_time": 1658146050064
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}
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```
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### Response fields
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Field | Data type | Description
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:--- | :--- | :---
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pit_id | [Base64 encoded binary]({{site.url}}{{site.baseurl}}/opensearch/supported-field-types/binary) | The PIT ID.
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creation_time | long | The time the PIT was created, in milliseconds since the epoch.
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## Extend a PIT time
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You can extend a PIT time by providing a `keep_alive` parameter in the `pit` object when you perform a search:
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```json
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GET /_search
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{
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"size": 10000,
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"query": {
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"match" : {
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"user.id" : "elkbee"
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}
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},
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"pit": {
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"id": "46ToAwMDaWR5BXV1aWQyKwZub2RlXzMAAAAAAAAAACoBYwADaWR4BXV1aWQxAgZub2RlXzEAAAAAAAAAAAEBYQADaWR5BXV1aWQyKgZub2RlXzIAAAAAAAAAAAwBYgACBXV1aWQyAAAFdXVpZDEAAQltYXRjaF9hbGw_gAAAAA==",
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"keep_alive": "100m"
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},
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"sort": [
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{"@timestamp": {"order": "asc", "format": "strict_date_optional_time_nanos"}},
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{"_shard_doc": "desc"}
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],
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"search_after": [
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"2021-05-20T05:30:04.832Z"
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]
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}
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```
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The `keep_alive` parameter in a search request is optional. It specifies the amount by which to extend the time to keep a PIT.
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{: .note}
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## List all PITs
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Introduced 2.4
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{: .label .label-purple }
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Returns all PITs in the OpenSearch cluster.
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### Cross-cluster behavior
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The List All PITs API returns only local PITs or mixed PITs (PITs created in both local and remote clusters). It does not return fully remote PITs.
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#### Sample request
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```json
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GET /_search/point_in_time/_all
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```
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#### Sample response
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```json
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{
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"pits": [
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{
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"pit_id": "o463QQEPbXktaW5kZXgtMDAwMDAxFnNOWU43ckt3U3IyaFVpbGE1UWEtMncAFjFyeXBsRGJmVFM2RTB6eVg1aVVqQncAAAAAAAAAAAEWcDVrM3ZIX0pRNS1XejE5YXRPRFhzUQEWc05ZTjdyS3dTcjJoVWlsYTVRYS0ydwAA",
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"creation_time": 1658146048666,
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"keep_alive": 6000000
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},
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{
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"pit_id": "o463QQEPbXktaW5kZXgtMDAwMDAxFnNOWU43ckt3U3IyaFVpbGE1UWEtMncAFjFyeXBsRGJmVFM2RTB6eVg1aVVqQncAAAAAAAAAAAIWcDVrM3ZIX0pRNS1XejE5YXRPRFhzUQEWc05ZTjdyS3dTcjJoVWlsYTVRYS0ydwAA",
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"creation_time": 1658146050064,
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"keep_alive": 6000000
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}
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]
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}
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```
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### Response fields
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Field | Data type | Description
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:--- | :--- | :---
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pits | Array of JSON objects | The list of all PITs.
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Each PIT object contains the following fields.
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Field | Data type | Description
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:--- | :--- | :---
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pit_id | [Base64 encoded binary]({{site.url}}{{site.baseurl}}/opensearch/supported-field-types/binary) | The PIT ID.
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creation_time | long | The time the PIT was created, in milliseconds since the epoch.
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keep_alive | long | The amount of time to keep the PIT, in milliseconds.
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## Delete PITs
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Introduced 2.4
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{: .label .label-purple }
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Deletes one, several, or all PITs. PITs are automatically deleted when the `keep_alive` time period elapses. However, to deallocate resources, you can delete a PIT using the Delete PIT API. The Delete PIT API supports deleting a list of PITs by ID or deleting all PITs at once.
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### Cross-cluster behavior
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The Delete PITs by ID API fully supports deleting cross-cluster PITs.
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The Delete All PITs API deletes only local PITs or mixed PITs (PITs created in both local and remote clusters). It does not delete fully remote PITs.
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#### Sample Request: Delete all PITs
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```json
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DELETE /_search/point_in_time/_all
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```
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If you want to delete one or several PITs, specify their PIT IDs in the request body.
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### Request fields
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Field | Data type | Description
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:--- | :--- | :---
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pit_id | [Base64 encoded binary]({{site.url}}{{site.baseurl}}/opensearch/supported-field-types/binary) or an array of binaries | The PIT IDs of the PITs to be deleted. Required.
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#### Sample request: Delete PITs by ID
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```json
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DELETE /_search/point_in_time
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{
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"pit_id": [
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"o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAEWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA",
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"o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAIWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA"
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]
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}
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```
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#### Sample response
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For each PIT, the response contains a JSON object with a PIT ID and a `successful` field that specifies whether the deletion was successful. Partial failures are treated as failures.
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```json
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{
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"pits": [
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{
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"successful": true,
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"pit_id": "o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAEWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA"
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},
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{
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"successful": false,
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"pit_id": "o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAIWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA"
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}
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]
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}
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```
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### Response fields
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Field | Data type | Description
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:--- | :--- | :---
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successful | Boolean | Whether the delete operation was successful.
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pit_id | [Base64 encoded binary]({{site.url}}{{site.baseurl}}/opensearch/supported-field-types/binary) | The PIT ID of the PIT to be deleted.
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## PIT segments
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Introduced 2.4
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{: .label .label-purple }
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Similarly to the [CAT Segments API]({{site.url}}{{site.baseurl}}/api-reference/cat/cat-segments), the PIT Segments API provides low-level information about the disk utilization of a PIT by describing its Lucene segments. The PIT Segments API supports listing segment information of a specific PIT by ID or of all PITs at once.
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#### Sample request: PIT segments of all PITs
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```json
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GET /_cat/pit_segments/_all
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```
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If you want to list segments for one or several PITs, specify their PIT IDs in the request body.
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### Request fields
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Field | Data type | Description
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:--- | :--- | :---
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pit_id | [Base64 encoded binary]({{site.url}}{{site.baseurl}}/opensearch/supported-field-types/binary) or an array of binaries | The PIT IDs of the PITs whose segments are to be listed. Required.
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#### Sample request: PIT segments of PITs by ID
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```json
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GET /_cat/pit_segments
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{
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"pit_id": [
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"o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAEWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA",
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"o463QQEPbXktaW5kZXgtMDAwMDAxFkhGN09fMVlPUkVPLXh6MUExZ1hpaEEAFjBGbmVEZHdGU1EtaFhhUFc4ZkR5cWcAAAAAAAAAAAIWaXBPNVJtZEhTZDZXTWFFR05waXdWZwEWSEY3T18xWU9SRU8teHoxQTFnWGloQQAA"
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]
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}
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```
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#### Sample response
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```json
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index shard prirep ip segment generation docs.count docs.deleted size size.memory committed searchable version compound
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index1 0 r 10.212.36.190 _0 0 4 0 3.8kb 1364 false true 8.8.2 true
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index1 1 p 10.212.36.190 _0 0 3 0 3.7kb 1364 false true 8.8.2 true
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index1 2 r 10.212.74.139 _0 0 2 0 3.6kb 1364 false true 8.8.2 true
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```
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## PIT settings
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You can specify the following settings for a PIT.
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Setting | Description | Default
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:--- | :--- | :---
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point_in_time.max_keep_alive | A cluster-level setting that specifies the maximum value for the `keep_alive` parameter. | 24h
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search.max_open_pit_context | A node-level setting that specifies the maximum number of open PIT contexts for the node. | 300 |