Re: [Xen-users] Re: Mounting domU filesystem on Dom0. (xm mount)

[Siim Vahtre <siim_@xxxxxxxx>]

On Thu, 15 Mar 2007, Ligesh wrote:

> In fact, that's a nice way to do perfect backup. Take an lvm snapshot 
> and also save the ram image, and you can restore the state perfectly.
Don't forget that you need to get memory and LVM snapshots in the _exact_ 
time. But if you "xm pause" just before snapshot+save, it might actually 
work (I really don't know).
However, you won't have "perfect" state. You will, for example, probably 
have a nice mess with your network connections if you restore the ram 
image after some connections have already timed out. It _might_ be a 
problem.
> lvm2 snapshot
> e2fsck -f -y /dev/lvm-snapshot
> mount -o ro /dev/lvm-snapshot /mnt/backup
> rsync /mnt/backup
You don't need forced fsck. Journal reply should be enough. But occational 
full fsck might be useful nevertheless.
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