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Add kill command
This page describes how to reduce the freeze time of an application by using the [[memory changes tracking]] ability to perform [http://en.wikipedia.org/wiki/Live_migration#Pre-copy_memory_migration pre-copy memory migration].
This page describes how to reduce the freeze time of an application by using the [[memory changes tracking]] ability to perform [[wikipedia:Live_migration#Pre-copy_memory_migration|pre-copy memory migration]].
{{Note|It is assumed that you already read [[Live migration]] article before this one.}}
{{Note|It is assumed that you already read [[Live migration]] article before this one.}}
[src]# criu dump --tree <pid> --images-dir <path-to-existing-directory-B> \
[src]# criu dump --tree <pid> --images-dir <path-to-existing-directory-B> \
--prev-images-dir <path-to-directory-A-relative-to-B> --leave-stopped
--prev-images-dir <path-to-directory-A-relative-to-B> --leave-stopped --track-mem
Note that:
Note that:
[src]# scp -r <path-to-images-dir> <dst>:/<path-to-images>
[src]# scp -r <path-to-images-dir> <dst>:/<path-to-images>
or using rsync
[src]# rsync -rl <path-to-images-dir>/ <dst>:<path-to-images>
Note: It is important to enable "copy symlinks as symlinks" (<code>-l</code> for <code>rsync</code>) to ensure that symlinks are preserved between previous directories. When <code>-r</code> is passed to <code>scp</code> it will follow symbolic links encountered in the tree traversal.
=== Restore ===
=== Restore ===
On the destination node restore the apps from images:
On the destination node restore the apps from images:
[dst]# criu restore --tree <pid> --images-dir <path-to-images>
[dst]# criu restore --images-dir <path-to-images>
=== Kill ===
=== Kill ===
If everything went OK you can kill stopped tasks on the source node:
If everything went OK you can kill stopped tasks on the source node:
[src]# FIXME put command here
[src]# kill <pid>
== Further reading ==
* [[P.Haul]] is the Go extension to CRIU doing [[live migration]]
[[Category: HOWTO]]
[[Category: HOWTO]]
[[Category: Memory]]
[[Category: Live migration]]