To ensure high availability of the search servers, you can start the search servers for individual collections even if the controller server is not running.
The ability to start and stop the search servers in stand-alone mode is not available from the administration console. If the index server is not running, the administration console cannot be accessed.
Before you can start and stop the search servers in stand-alone mode, ensure that the crawler, document processing, and search servers for the collection have all been started at least once. This is necessary to ensure that required files are synchronized on the search servers.
If document-level security is enabled for the collection, ensure that the crawler server is also started. This is necessary to ensure that document-level security controls can be enforced. If the crawler server is not running, only documents that do not require authentication are returned in the query results.
If the controller server is unavailable, you can ensure that users are able to continue searching the system by starting the search servers in stand-alone mode. You can run the commands for starting and stopping the search servers from any server in a multiple server installation. The commands attempt to start or stop the search servers for the specified collection on all available search servers.
To start or stop the search servers in stand-alone mode: