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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
- How to run the tool
- 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.
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
- Commits
- Mainline kernel commits tracker
- 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, Pronghorn: Effective Checkpoint Orchestration for Serverless Hot-Starts
- 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
- 2022-11-13, Out of hypervisor (OoH): efficient dirty page tracking in userspace using hardware virtualization feature
- 2022-08-07, iContainer: Consecutive Checkpointing with Rapid Resilience for Immortal Container-based Services
Other
- Project history
- Logo description
- Events
- Join the CRIU acronym fun