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<big>Welcome to CRIU, a project to implement checkpoint/restore functionality for Linux.

<big>Welcome to CRIU, a project to implement checkpoint/restore functionality for Linux.

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.

Checkpoint/Restore In Userspace, or CRIU (pronounced kree-oo, IPA: /krɪʊ/, Russian: криу), is a software tool for the Linux operating system. Using this tool, you can freeze a running application (or part of it) and checkpoint it as a collection of files on disk. You can then use the files to restore the application and run it exactly as it was during the time of the freeze. With this feature, application live migration, snapshots, remote debugging, and [[usage scenarios|many other things]] are possible.

 

CRIU started as a project of [https://virtuozzo.com/ Virtuozzo] and grew with tremendous help from the [[community]]. It is currently used by (integrated into) [https://openvz.org/ OpenVZ], [[LXC]]/LXD, [[Docker]], and [[Integration|other software]], and CRIU packages is included into many [[Packages|Linux distributions]].

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== Using ==

== Using ==

: 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. Also a set of [[asciinema]] records for real-life examples.

: 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. Also a set of [[asciinema]] records for real-life examples.

;[[When C/R fails]]

;[[FAQ]] & [[When C/R fails]]

: A sort of troubleshooting guide

: A sort of troubleshooting guide

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== Developing ==

== Developing ==

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

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

: What to keep in mind when writing new code

: What to keep in mind when writing new code

;[https://coveralls.io/github/xemul/criu Code coverage results]

;[https://coveralls.io/github/checkpoint-restore/criu Code coverage results]

: Shows how zdtm run covers the criu code paths

: Shows how zdtm run covers the criu code paths

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== [[:Category:Under the hood|Under the hood]] ==

== Under the hood ==

* [[Checkpoint/Restore]]

* [[Checkpoint/Restore]]

* [[:Category:Network]]

* [[:Category:Network]]

* [[:Category:Files]]

* [[:Category:Files]]

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== External links ==

== External links ==

{{:Articles}}

{{:Articles}}

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== Audio ==

== Misc ==

{{:Podcasts}}

* [[Podcasts]] and other audio/video interviews

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* Project [[history]]

* Project [[history]]

* [[Logo]] description

* [[Logo]] description

* [[Events]]

* [[Events]]

* Join the [[CRIU acronym fun]]

* [[CRIU acronym fun]]

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