Milan Babuskov wrote:

> --- Nigel Weeks wrote:
>> We use it for all of our firebird synchronizations, even on live
>> databases, although we use FreeBSD filesystem snapshots, which
>> Linux and Windows are yet to "invent".
>
> Well, not really, Linux has it. It was alvailable for 2.4 kernels, and
> since about a week ago, 2.6 kernel is also supported:
>
> http://www.ext3cow.com/

Not to mention snapshot support in both LVM and EVMS.

http://tldp.org/HOWTO/LVM-HOWTO/snapshots_backup.html
http://www.faqs.org/docs/evms/evmscreatesnap.html

ciao, lele.