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This version of the OpenSearch documentation is no longer maintained. For the latest version, see the current documentation. For information about OpenSearch version maintenance, see Release Schedule and Maintenance Policy.

Clone index

The clone index API operation clones all data in an existing read-only index into a new index. The new index cannot already exist.


PUT /sample-index1/_clone/cloned-index1
  "settings": {
    "index": {
      "number_of_shards": 2,
      "number_of_replicas": 1
  "aliases": {
    "sample-alias1": {}

Path and HTTP methods

POST /<source-index>/_clone/<target-index>
PUT /<source-index>/_clone/<target-index>

Index naming restrictions

OpenSearch indexes have the following naming restrictions:

  • All letters must be lowercase.
  • Index names can’t begin with underscores (_) or hyphens (-).
  • Index names can’t contain spaces, commas, or the following characters:

    :, ", *, +, /, \, |, ?, #, >, or <

URL parameters

Your request must include the source and target indexes. All other clone index parameters are optional.

Parameter Type Description
<source-index> String The source index to clone.
<target-index> String The index to create and add cloned data to.
wait_for_active_shards String 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 operation 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 the request to return. Default is 30s.

Request body

The clone index API operation creates a new target index, so you can specify any index settings and aliases to apply to the target index.


    "acknowledged": true,
    "shards_acknowledged": true,
    "index": "cloned-index1"
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