Creating OpenSearch rollover indices

If you need to create a new OpenSearch index, you can use the _rollover API. For example, your index might be too large or too old, or you might want to use a different number of shards.

About this task

One example of using the _rollover API is deciding the number of shards of your index. Upon startup, IBM Business Automation Insights creates indices that are made of five shards and one replica. You can update the number of replicas of an existing index, but not the number of shards. By using the _rollover API, you can pass the number of shards you want as a payload to the POST request that regenerates the index.