121 lines
5.7 KiB
Markdown
121 lines
5.7 KiB
Markdown
---
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layout: default
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title: Reindex
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parent: Document APIs
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nav_order: 60
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---
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# Index document
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Introduced 1.0
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{: .label .label-purple}
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The reindex API operation lets you copy all or a subset of your data from a source index into a destination index.
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## Example
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```json
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POST /_reindex
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{
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"source":{
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"index":"my-source-index"
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},
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"dest":{
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"index":"my-destination-index"
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}
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}
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```
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## Path and HTTP methods
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```
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POST /_reindex
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```
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## URL parameters
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All URL parameters are optional.
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Parameter | Type | Description
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:--- | :--- | :---
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refresh | Boolean | If true, OpenSearch refreshes shards to make the reindex operation available to search results. Valid options are `true`, `false`, and `wait_for`, which tells OpenSearch to wait for a refresh before executing the operation. Default is `false`.
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timeout | Time | How long to wait for a response from the cluster. Default is `30s`.
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wait_for_active_shards | String | The number of active shards that must be available before OpenSearch processes the reindex request. Default is 1 (only the primary shard). Set to `all` or a positive integer. Values greater than 1 require replicas. For example, if you specify a value of 3, the index must have two replicas distributed across two additional nodes for the operation to succeed.
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wait_for_completion | Boolean | Waits for the matching tasks to complete. Default is `false`.
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requests_per_second | Integer | Specifies the request’s throttling in sub-requests per second. Default is -1, which means no throttling.
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require_alias | Boolean | Whether the destination index must be an index alias. Default is false.
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scroll | Time | How long to keep the search context open. Default is `5m`.
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slices | Integer | Number of sub-tasks OpenSearch should divide this task into. Default is 1, which means OpenSearch should not divide this task. Setting this parameter to `auto` indicates to OpenSearch that it should automatically decide how many slices to split the task into.
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max_docs | Integer | How many documents the update by query operation should process at most. Default is all documents.
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## Request body
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Your request body must contain the names of the source index and destination index. All other fields are optional.
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Field | Description
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:--- | :---
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conflicts | Indicates to OpenSearch what should happen if the delete by query operation runs into a version conflict. Valid options are `abort` and `proceed`. Default is abort.
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source | Information about the source index to include. Valid fields are `index`, `max_docs`, `query`, `remote`, `size`, `slice`, and `_source`.
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index | The name of the source index to copy data from.
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max_docs | The maximum number of documents to reindex.
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query | The search query to use for the reindex operation.
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remote | Information about a remote OpenSearch cluster to copy data from. Valid fields are `host`, `username`, `password`, `socket_timeout`, and `connect_timeout`.
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host | Host URL of the OpenSearch cluster to copy data from.
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username | Username to authenticate with the remote cluster.
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password | Password to authenticate with the remote cluster.
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socket_timeout | The wait time for socket reads. Default is 30s.
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connect_timeout | The wait time for remote connection timeouts. Default is 30s.
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size | The number of documents to reindex.
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slice | Whether to manually or automatically slice the reindex operation so it executes in parallel.
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_source | Whether to reindex source fields. Specify a list of fields to reindex or true to reindex all fields. Default is true.
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id | The ID to associate with manual slicing.
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max | Maximum number of slices.
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dest | Information about the destination index. Valid values are `index`, `version_type`, and `op_type`.
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index | Name of the destination index.
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version_type | The indexing operation's version type. Valid values are `internal`, `external`, `external_gt` (retrieve the document if the specified version number is greater than the document’s current version), and `external_gte` (retrieve the document if the specified version number is greater or equal to than the document’s current version).
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op_type | Whether to copy over documents that are missing in the destination index. Valid values are `create` (ignore documents with the same ID from the source index) and `index` (copy everything from the source index).
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script | A script that OpenSearch uses to apply transformations to the data during the reindex operation.
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source | The actual script that OpenSearch runs.
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lang | The scripting language. Valid options are `painless`, `expression`, `mustache`, and `java`.
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## Response
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```json
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{
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"took": 28829,
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"timed_out": false,
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"total": 111396,
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"updated": 0,
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"created": 111396,
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"deleted": 0,
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"batches": 112,
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"version_conflicts": 0,
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"noops": 0,
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"retries": {
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"bulk": 0,
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"search": 0
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},
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"throttled_millis": 0,
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"requests_per_second": -1.0,
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"throttled_until_millis": 0,
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"failures": []
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}
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```
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## Response body fields
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Field | Description
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:--- | :---
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took | How long the operation took in milliseconds.
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timed_out | Whether the operation timed out.
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total | The total number of documents processed.
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updated | The number of documents updated in the destination index.
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created | The number of documents created in the destination index.
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deleted | The number of documents deleted.
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batches | Number of scroll responses.
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version_conflicts | Number of version conflicts.
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noops | How many documents OpenSearch ignored during the operation.
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retries | Number of bulk and search retry requests.
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throttled_millis | Number of throttled milliseconds during the request.
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requests_per_second | Number of requests executed per second during the operation.
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throttled_until_millis | The amount of time until OpenSearch executes the next throttled request.
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failures | Any failures that occurred during the operation.
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