opensearch-docs-cn/_api-reference/index-apis/open-index.md

layout	title	parent	nav_order
default	Open index	Index APIs	40

Open index

Introduced 1.0 {: .label .label-purple }

The open index API operation opens a closed index, letting you add or search for data within the index.

Example

POST /sample-index/_open

{% include copy-curl.html %}

Path and HTTP methods

POST /<index-name>/_open

URL parameters

All parameters are optional.

Parameter	Type	Description
<index-name>	String	The index to open. Can be a comma-separated list of multiple index names. Use _all or * to open all indices.
allow_no_indices	Boolean	Whether to ignore wildcards that don't match any indices. Default is true.
expand_wildcards	String	Expands wildcard expressions to different indices. Combine multiple values with commas. Available values are all (match all indices), open (match open indices), closed (match closed indices), hidden (match hidden indices), and none (do not accept wildcard expressions). Default is open.
ignore_unavailable	Boolean	If true, OpenSearch does not search for missing or closed indices. Default is false.
wait_for_active_shards	String	Specifies the number of active shards that must be available before OpenSearch processes the 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 request to succeed.
master_timeout	Time	How long to wait for a connection to the master node. Default is 30s.
timeout	Time	How long to wait for a response from the cluster. Default is 30s.
wait_for_completion	Boolean	When set to false, the request returns immediately instead of after the operation is finished. To monitor the operation status, use the Tasks API with the task ID returned by the request. Default is true.
task_execution_timeout	Time	The explicit task execution timeout. Only useful when wait_for_completion is set to false. Default is 1h.

Response

{
  "acknowledged": true,
  "shards_acknowledged": true
}