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.
As part of your request, you can optionally specify [index settings]({{site.url}}{{site.baseurl}}/im-plugin/index-settings/), [mappings]({{site.url}}{{site.baseurl}}/field-types/index/), and [aliases]({{site.url}}{{site.baseurl}}/opensearch/index-alias/) for your newly created index.