# Using Elasticsearch Previous to `v2.4.0`, Magento2 offers the possibility to select the catalog search engine between MySql and Elasticsearch. The following versions will use Elasticsearch by default. If you are using Elasticsearch as a search engine you must install Nosto CMP module version `>= 3.0.0` . The module does not require any further configuration. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.nosto.com/magento-2/addons/cmp/guides/using-elasticsearch.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.