Main Page

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

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

Download Tarball: criu-4.3.1.tar.gz Version: 4.3.1 "CRIURBO" Released: 12 Nov 2026 GIT tag: v4.3.1 Installation • Usage Releases

Using

CR tools

Main checkpoint/restore utility description (sort of HOWTO)

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 Middleware 2026 December 18, 2026 in Tarragona, Spain Transparent and Unified CPU-GPU Snapshots for LLM Inference Platforms CANOPIE-HPC @ Supercomputing 2026 November 16, 2026 in Chicago, Illinois Parallel Restore-Optimized Snapshot Compression for Cost-Efficient Inference Serving Linux Plumbers Conference 2026 October 7, 2026 in Prague, Czech Republic Containers and Checkpoint/Restore Microconference Memory Tracking in forensic checkpointing: what soft-dirty bits can’t tell us Addressing Challenges for Container Migration in Heterogeneous Clusters Checkpoint/Restore of Device Cgroup eBPF Programs Enabling Incremental Checkpointing for GPU Workloads Checkpoint/Restore for RDMA: Saving and Restoring Live Queue Pairs with CRIU Kubernetes Bytes October 2, 2026 What if Kubernetes Could Resume Instead of Restart? | Checkpoint / Restore Explained

Under the hood

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

External links

• 2026-12-18, Transparent and Unified CPU-GPU Snapshots for LLM Inference Platforms
• 2026-11-16, Parallel Restore-Optimized Snapshot Compression for Cost-Efficient Inference Serving
• 2026-09-21, Fast Recovery for LLM Serving via Decoupled Device Memory Lifetime in Dynamo
• 2026-07-22, Forensic Analysis of Container Snapshot Chains for Post-event Reconstruction
• 2026-07-14, Accelerating Model Inference with On‑the‑Fly Snapshot Compression

More external articles...

Other

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