>>>>> And what happen on rollover ?
>>>> You can't start any new transactions - which is a pretty serious
>>>> problem when you need to use one to make backup to restore.
>
>
> I think the answer is to make the database read only, then you can
> do the backup. Gfix should work.

But even with read only database each transaction will get
unique transaction id, starting with value of next transaction
stored on database header page. That is why I think that
value on header page should be slightly changed before backup.

Ivan