CFV: New Project: CRaC

Anton Kozlov akozlov at
Fri Jul 30 19:17:30 UTC 2021

I hereby propose the creation of the CRaC Project with myself, Anton Kozlov,
as the Lead and the HotSpot Group as the sponsoring Group.

The CRaC (Coordinated Restore at Checkpoint) [1] project will research
coordination of Java programs with mechanisms to checkpoint (make an image of,
snapshot) a Java instance while it is executing.  Restoring from the image
could be a solution to some of the problems with the start-up and warm-up
times.  The primary aim of the project is to develop a new standard
mechanism-agnostic API to notify Java programs about the checkpoint and restore
events.  Other research activities will include, but will not be limited to,
integration with existing checkpoint/restore mechanisms and development of new
ones, changes to JVM and JDK to make images smaller and ensure they are

The existing proof-of-concept implementation based on the OpenJDK [2] will be a
starting point of the project.

I work at Azul developing JVM and JDK, focusing on bug fixing, support of new
platforms, and start-up/warm-up optimizations.  I'm a co-author of JEP-391 and
author of the CRaC proof-of-concept implementation.

Initial Committers and Reviewers are:
Volker Simonis (Committer)
Anton Kozlov (Reviewer)

Votes are due by Friday, 13 August 2021, 20:00:00 GMT.

Only current OpenJDK Members [3] are eligible to vote on this
motion.  Votes must be cast in the open on the discuss list.
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For Lazy Consensus voting instructions, see [4].

Anton Kozlov


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