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CRIU

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Wow, CRIU is asked about on stackoverflow :) For quite a long already!
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Alexander Shorin's profile photoIgor Gnatenko's profile photo
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"CRIU plus systemd" attempt #1: FAILED :\
With handy integration between machined, nspawn etc throughout the stack the next useful addition would be integration with CRIU: http://www.criu.org/Main_Page Would be really handy is I could cal...
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Maksim Melnikau's profile photoPavel Emelyanov's profile photoIgor Gnatenko's profile photo
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Even if we had one, until there's an approval from systemd maintainers we're still failed :)
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+Pavel Emelyanov talked about CRIU at Russian Internet Forum, OSday 2015 (in Russian)
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CRIU visits Innopolis for OSDAY conference.
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Demo of live migration Docker container with Quake server inside using CRIU https://www.youtube.com/watch?v=mL9AFkJJAq0&feature=youtu.be&t=22m14s
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Alexander Shorin's profile photoAlexander Petrov's profile photo
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BTW, with recent 1.6 one thing came unnoticed:

 [xemul@nb criu]$ git grep -l . | xargs wc -l | tail -n1
 102989 total

Total (including tests) code size grew above the 100k barrier!
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While CRIU support is merged into libcontainer, some more work is to be done for the Docker itself. You can watch how it goes in this pull request.
Adds support in the daemon and driver for checkpoint and restore, and exposes that in the API, but not in the CLI yet.
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+Pavel Emelyanov at OSday conference with his "Home-made Process Preserves" talk (Russian: "Консервация процессов в домашних условиях"). Slides are available here: http://www.slideshare.net/openvz/criu-osday2015rus
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+Kirill Kolyshkin is coming to Boston to talk about Containers and CRIU.
The website of the Boston, 2015 edition of the community container (un)conference
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Checkpoint/Restore In Userspace
Introduction
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 these 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.
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