Final answer:
A searchable rolling-restart is initiated by sending a signal to the system to start the restart process. It allows services or applications to be restarted one after another without interrupting the overall system, often used for updating software or hardware components.
Step-by-step explanation:
In computer systems, a rolling-restart is a process where services or applications are restarted one after another without interrupting the overall system. It is commonly used to update and refresh software or hardware components while ensuring continuous availability. To initiate a searchable rolling-restart, an administrator or an automated script can send a signal to the system to start the restart process.
For example, suppose a company operates a web application with multiple servers. When they need to update the application, they can initiate a rolling-restart to ensure that the application remains accessible to users while each server is being restarted. This way, the overall downtime is minimized, and the application can continue serving requests throughout the restart process.