> Some backup methods allow to restore database to a particular
> point in time
> which is not neccesserally a time when backup started but can be a later
> timestamp instead. This is basically about maintaining a
> sequential change
> log and it's backup which can be used to roll-forward a database
> after it is
> restored from a main backup. The point is that change log is split into
> rather small files and those files can be backuped as they are created.
>
> Then to restore a database one needs to restore it from a main backup and
> then roll-forward using backuped change logs:
> - it takes time to roll-forward of course
> - but one can restore database up to the last available change
> log file - if
> log files are not too large then one loses as much data as fits
> into one log
> file.
>
> Basically this is about availability which can be achieved by
> other means as
> well, e.g. by replication.
>

You had best take alook at the IBLogmanager - it has rollForward logs and
soon to have roolback logs as well.
Alan