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Download Tarball: criu-4.1.tar.gz Version: 4.1 "CRISCV" Released: 25 Mar 2025 GIT tag: v4.1 Installation • Usage Releases

Welcome to CRIU, a project to implement checkpoint/restore functionality for Linux in userspace.

Checkpoint/Restore In Userspace, or CRIU, 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.

The project is currently under very active development. CRIU is a sub-project of OpenVZ.

Using

Installation

What to do to have CRIU on your system

Usage scenarios

Ideas how crtools can be used (some are crazy indeed)

What software is supported

Describes TODO list in higher level terms

LXC

How to dump and restore an LXC container

Developing

If you're interested in CRIU development, please subscribe to the criu mailing list: https://openvz.org/mailman/listinfo/criu

Images

Description of image files format

Commits

Mainline kernel commits tracker

ZDTM Test Suite

Zero downtime test suite

TODO

Current TODO list

Events KubeCon EU 2025 April 3, 2025, London, UK Efficient Transparent Checkpointing of AI/ML Workloads in Kubernetes Transparent, Infra-Level Checkpoint and Restore for Resilient AI/ML Workloads at Scale FOSDEM 2025 February 1, 2025, Brussels, Belgium State of Checkpoint/Restore in Kubernetes Optimizing Resource Utilization for Interactive GPU Workloads with Transparent Container Checkpointing

Under the hood

• Sockets
• Memory dumping and restoring
• Checkpoint/Restore
• TCP connection
• Porting crtools to new kernel releases
• Files

External links

• 2025-02-23, CRIUgpu: Transparent Checkpointing of GPU-Accelerated Workloads
• 2024-11-14, On-demand and Parallel Checkpoint/Restore for GPU Applications
• 2024-09-06, Live Migration of Multi-Container Kubernetes Pods in Multi-Cluster Serverless Edge Systems
• 2024-09-04, Towards Efficient End-to-End Encryption for Container Checkpointing Systems
• 2024-08-21, The State of Container Checkpointing with CRIU: A Multi-Case Experience Report
• 2024-08-04, Custom Page Fault Handling With eBPF
• 2024-08-03, Software-based Live Migration for Containerized RDMA
• 2024-07-30, Packet Buffering to Minimize Service Downtime and Packet Loss During Redundancy Switchover
• 2024-07-30, Don't, Stop, Drop, Pause: Forensics of CONtainer CheckPOINTs (ConPoint)

More external articles...

Other

• Project history
• Logo description
• Events
• Join the CRIU acronym fun

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CRIU is a sub-project of
http://static.openvz.org/wiki/openvz-logo.png