The cloud has been a boon for many companies, enabling CIOs to turn off servers or even shutter data centers. CIOs rent processing power, storage and other tools from a mix of vendors in a quickly growing market. But a small contingent of IT leaders is looking to a more efficient way to rent computing horsepower. Rather than take on the often onerous obligations of designing and managing cloud architecture, they are going “serverless.”
With serverless computing, cloud instances are no longer allocated, only to sit idle until called upon to fuel applications and other functions. Rather, resources are provisioned only when a specific event occurs. A textbook example of event-based computing is the internet of things (IoT), with sensor-based devices reacting to triggers on the fly. And when a user accesses a mobile app from his or her smartphone — an event — virtual machines in the cloud retrieve and serve up the information.