# OSGi artifacts deployment Pentaho is built on top of an [OSGi](https://www.osgi.org/) container ([Apache Karaf](https://karaf.apache.org/)). You can use the OSGi container as a simple modular approach at both development time and runtime, reducing complexity and facilitating deployment. Pentaho supports deployment of the OSGi container via dropping files into the deploy folder. Hot deployment is supported. Artifacts are automatically installed and activated. They remain activated, even after restarts of the product. Replacing an artifact in the deploy folder will reinstall it. Deleting it, will uninstall it. The deployer handles ZIP and TGZ files, such as those files generated by the `npm pack` command. You can include web resources described by a `package.json` file within the ZIP and TGZ files. You can contain multiple web packages in a single archive, to provision visualization’s dependencies for example. Depending on the Pentaho product, the Karaf deploy folder is located in the following directory: * **PDI** `system/karaf/deploy` * **Pentaho Server** `pentaho-solutions/system/karaf/deploy` --- # 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.pentaho.com/pdia-admin/pentaho-developer-center-overview-cp/platform-javascript-apis/osgi-artifacts-deployment-visapi-reference.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.