Curry On
July 15-16th, 2019

Checkpointing for Java
Christine Flood


Java has evolved significantly in the past 20+ years. Users still want to run highly scalable monolithic applications, but now they also want to run in the cloud with fast startup and a small footprint. Checkpointing will solve at least half of that problem.

In this session, we’ll show you how to checkpoint your Java application and then restore it on a different machine—or several different machines. An application that might take minutes to warm up can be warmed up, garbage collected, etc., and then checkpointed. Users can restore Java processes in ms. We’ll also give an overview of CRIU (checkpoint restore in userspace) a Linux utility that Java checkpointing is based on, present the proposed Java API, and then discuss some interesting use cases.


Christine H. Flood is a software developer at Red Hat working on OpenJDK. She’s committed to bringing new programming language design features to Java so that it remains relevant for another 20 years.