2.6.16 OpenVZ series supports migration since 2.6.16-026test009.1 version. However in later versions a lot of fixes for checkpointing (hence migration) exist. Thus it's always recommended to use the latest kernel.
2.6.8 OpenVZ series doesn't support migration.
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I have been trying few of them but there seems to be some problem with them.
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What were exact problems? If you have something like that on the screen:
Setup checkpoint...
Error: No checkpointing support, unable to open /proc/cpt: No such file or directory
Failed to suspend VPS
then read the answer on this post, please: http://forum.openvz.org/index.php?t=tree&goto=6786&# msg_6786
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Is that live migration stuff done completed and can be tested?
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YES, It is completed and can bve tested!
HTH,
vass.