Can ZFS or btrfs create successful snapshots of VMs? Thanks, Kent
On Thu, Aug 13, 2009 at 3:24 PM, Etienne Goyer<[email protected]> wrote: > Mat wrote: >> Just an idea: what if both a KVM snapshot and the LVM snapshot could be >> done at the same time? It should then be possible to bring the VM up in >> a running state. > > I guess that might be good in some circumstance, but only when it's ok > to get a system in a previous running state. This is not always the > case; for example, you would not want a mail server to go back a couple > of hours in time (mail in the queue at backup time would get redelivered > at restore time, mail deleted from user inbox would reappear, mail > delivered to user's inbox since backup would disappear, etc). > >> My idea is probably trying to address the underlining issue from the >> wrong angle. I suppose that if I needed a service to run 24/7 and >> downtime was not acceptable, I would run my services in a server farm >> with proper fault-tolerance and redundancy, and where database backup >> and recoveries wouldn't be done on the VM level. > > I do not know. Backup is a tough problem, and there is no > one-size-fit-all solution. Dumping the file system content and > checkpointing system states have been the two most common approaches to > date, but they are flawed for many applications. It's all a matter of > compromise. But yeah. backup is second best after resiliency, so you > may want to invest your time and brain cycles in that instead. > > Just my 0.02$ ... > > -- > Etienne Goyer > Technical Account Manager - Canonical Ltd > Ubuntu Certified Instructor > > ~= Ubuntu: Linux for Human Beings =~ > > -- > ubuntu-server mailing list > [email protected] > https://lists.ubuntu.com/mailman/listinfo/ubuntu-server > More info: https://wiki.ubuntu.com/ServerTeam > -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
