RE: [UM1-coders] Object Store

[Adrian S. J. <AS...@pa...>]

> From: Peter Crowther [mailto:pet...@ne...]
> > From: Adrian St. John [mailto:AS...@pa...]
> > Taking a step back, what problem are we trying to solve?
>=20
> I have no idea.  I presume it's the problem that the game=20
> sometimes crashes
> without a database dump.  This is rare, and getting rarer.  I=20
> can see no
> other reason for using such a database.

I've found the reason for that happening; It occurs if you
overwrite the running executable. Solaris nicely trashes the
entire game because the 'mv' seems to truncate the file, rather
than unlink & recreate.

> > If we're looking for a secure way of storing the data, then
> > this isn't it. It is in-process, and therefore prone to the
> > same problems we have already (if we crash unexpectedly the
> > data could be in a bad state).
>=20
> Does it transaction-log?

Not that I can tell. All it gives you is a way of storing arbitrary
objects to disk, and it looks like it does it by having a custom
memory allocator that writes into a mmap'd file.

Adrian.