Main Page
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Welcome to CRIU, a project to implement checkpoint/restore functionality for Linux in userspace.
Checkpoint/Restore In Userspace, or CRIU (pronounced kree-oo, IPA: /krɪʊ/, Russian: криу), is a software tool for Linux operating system. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space.
Using
- Installation
- What to do to have CRIU on your system
- Usage scenarios
- Ideas how criu can be used (some are crazy indeed)
- What software is supported
- Describes TODO list in higher level terms
- Category:HOWTO
- Collection of real world examples of how to use CRIU. Some are complex, some are not. HOW TO dump a simple loop might be the best one to start with.
- What can change after C/R
- CRIU cannot (yet) save and restore every single bit of tasks' state. This page describes what bits visible through standard kernel API are such.
- What cannot be checkpointed
- What an application could do to make CRIU refuse to dump it.
Developing
If you're interested in CRIU development, please subscribe to the criu mailing list: http://lists.openvz.org/mailman/listinfo/criu
- Images
- Description of image files format
- Plugins
- CRIU can call plugins provided by people
- Upstream kernel commits
- Mainline kernel commits tracker
- Recent commits
- CRIU tool repository commits
- Manpages
- Kernel's manpages commits tracker
- ZDTM Test Suite
- Zero downtime test suite
- TODO
- Current TODO list
- Postulates
- What to keep in mind when writing new code
- Code coverage results
- Shows how zdtm run covers the criu code paths
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Under the hood
External links
- 2024-04-22, Just-In-Time Checkpointing: Low Cost Error Recovery from Deep Learning Training Failures
- 2024-04-22, Pronghorn: Effective Checkpoint Orchestration for Serverless Hot-Starts
- 2024-01-29, Prebaking runtime environments to improve the FaaS cold start latency
- 2023-11-12, Checkpoint/Restart for CUDA Kernels
- 2023-10-23, Evicting for the greater good: The Case for Reactive Checkpointing in Serverless Computing
- 2023-04-20, A Dynamic Checkpoint Interval Decision Algorithm for Live Migration-Based Drone-Recovery System
- 2023-03-10, Forensic Container Analysis
- 2023-01-14, Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level
- 2022-12-05, Forensic container checkpointing in Kubernetes
Other
- Project history
- Logo description
- Events
- Join the CRIU acronym fun