We have implemented a Zap prototype in Linux that supports transparent migration of unmodified applications without any kernel modifications. Our Linux Zap system extends a novel checkpoint / restart mechanism implementation from our earlier work on CRAK, a system that provided process Checkpoint and Restart As a Kernel Module for Linux. We demonstrate that our Linux Zap prototype can provide general-purpose process migration functionality with low overhead. Our experimental results for migrating pods used for running a standard user's X windows desktop computing environment and for running an Apache web server show that these kinds of pods can be migrated with subsecond checkpoint and restart latencies.
- Kernel-based checkpoint and restart, LWN.net, August 2008.
- CRAK source code for the kernel module and some utilities for Linux 2.2.19, 2.4.4 (beta), and 2.4.4 with socket support (alpha).
- Zap Developers Mailing List. Open to Zap and CRAK developers to subscribe to discuss Zap and CRAK development and deployment issues.