On Sun, 2008-01-13 at 13:23 +0100, Jason Johnson wrote:
> Is an object database like Magma too slow for this? If so, perhaps
> there is a journaling package somewhere (i.e. what ext3, reiserfs and
> any modern filesystem does to ensure no data loss if power is lost) or
> one could be written?
> 
It is a modern myth that journaling filesystems protect you from data
loss. That is not true. It can be achieved to certain degree but
generally speaking it isn't very practical.
A journaling filesystem caches filesystem structure not data. It saves 
you from filesystem corruption. You may loose the data which was
written at the time of the failure. But it prevents that you loose
all of the data only because a very prominent filesystem node got
corrupted. Caching all data and writing it to jounal than to the 
filesystem would degrade the performance.


Norbert
> On Jan 9, 2008 11:32 AM, John Thornborrow <john at pinesoft.co.uk> wrote:
> > We have a squeaksource image running, and if the image crashes we lose
> > any new projects and/or users registered since the last save. Thus a
> > periodic, automatic/programmatic save would be ideal.
> >
> > Regards,
> > John
> >
> > www.pinesoft.co.uk
> >
> >
> > Tom Phoenix wrote:
> > > On Jan 8, 2008 10:18 AM, itsme213 <itsme213 at hotmail.com> wrote:
> > >
> > >> I need to urgently do both these saves:
> > >>   - do these on command (via Seaside app interface)
> > >>   - automatically on a timer
> > >
> > > Why is it urgent to save "automatically on a timer"? Is it because
> > > you're using the image to hold key data that should really be kept in
> > > a database?
> > >
> > > Cheers!
> > >
> > > --Tom Phoenix
> > >
> > >
> > >
> > >
> > >
> >
> >
> > Pinesoft Computers are registered in England, Registered number: 2914825. Registered office: 266-268 High Street, Waltham Cross, Herts, EN8 7EA
> >
> >
> >
> > This message has been scanned for viruses by BlackSpider MailControl - www.blackspider.com
> >
> >
> >
>