"Instant On" for applications is essential in cloud and servlerless environments where scale-to-zero is used to minimize costs without introducing high latency for the application user. CRIU is a powerful technology that can be used to achieve fast startup times. However, CRIU alone is not sufficient, there are many factors that need to be addressed in order to achieve a successful restore. Join Tobi and Tom as they demonstrates how Liberty InstantOn leverages OpenJ9 CRIU Support to achieve fast startup time while keeping applications functionally sound. This session will introduce the audience to the OpenJ9 CRIU Support API, and discuss some of challenges with checkpoint/restore and the JVM enhancements introduced to address those challenges. The audience will learn why these enhancements are required to enable Liberty InstantOn applications to function properly in a checkpoint/restore world.