Bill,
OpenVZ will have live zero downtime migration and suspend/resume some
time next month.
Please clarify. Currently a migration involves:
- stopping or suspending the instance
- backing up the instance and all of its data
- creating an environment for the instance on a new machine
- transporting the data to a new machine
- installing the instance and all data
- starting the instance
If you could just briefly cover how you do each of these steps with zero
downtime...
it does exactly what you wrote with some minor steps such as networking
stop on source and start on destination etc.
So I would detailed it like this:
- freeze VPS
- freeze networking
- copy VPS data to destination
- dump VPS
- copy dump to the destination
- restore VPS
- unfreeze VPS
- kill original VPS on source
Moreover, in OpenVZ live migration allows to migrate 32bit VPSs between
i686 and x86-64 Linux machines.
Thanks,
Kirill
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