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<H1>Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</LI>
<LI><em>From</em>: Matt Chatterley <<A HREF="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</A>></LI>
<LI><em>Date</em>: Sun, 22 Mar 1998 19:22:29 +0000 (GMT)</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:neddy#itl,net">neddy#itl,net</A></LI>
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<PRE>
On Sun, 22 Mar 1998, Vadim Tkachenko wrote:
> Joel Dillon wrote:
> > On Sat, 21 Mar 1998, Ben Greear wrote:
> >
> > >
> > > I'm contemplating a space based game, where once started, it will
> > > never again resemble it's starting state (unless the starting world
> > > image is saved of course.) It will be written in Java.
> > >
> > I've been thinking along these lines (a non-resetable mud) except
> > I'm using C++.
> >
> > > The game will need to update it's persistant storage very often
> > > to make this feasible.
> >
> > How often is very often? Wouldn't a backup and save to disk every
> > half-hour or so be ok?
>
> Why don't you think about some abstract number instead of half-hour?
> What about 'as soon as needed', and make it incremental, so only changed
> data is being queued for update, and update is being performed in a
> background low-priority thread?
A valid notion. My mud is being set up so that rather than the (standard
for LPmuds as far as I know) system of rebooting once per period of time
(usually 24-48 hours), it will reboot at any time within a period of 6
hours when there are no user connections open to the server.
Obvious advantage: Players are never inconvenienced by reboots.
Obvious disadvantage: What if there is never such a gap? Well,
statistically speaking, if it checks every 6 hours, it'll check 28 times a
week (and these times will reflect the period at which it last rebooted,
so it will hit the same time again). Should it go a period of y days with
no reboot, it will reduce the frequency of checks. At some time, the mud
will be empty. :P
I was briefly toying with the idea of rigging a system so that users were
not disconnected during reboots. Unsure on this currently.
[Snip rest]
--
Regards,
-Matt Chatterley
Spod: <A HREF="http://user.super.net.uk/~neddy/spod/spod.html">http://user.super.net.uk/~neddy/spod/spod.html</A>
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<li><strong><A NAME="00881" HREF="msg00881.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>
<ul compact><li><em>From:</em> Vadim Tkachenko <vt#freehold,crocodile.org></li></ul>
<li><strong><A NAME="00853" HREF="msg00853.html">World Persistence, flat files v/s DB v/s ??</A></strong>
<ul compact><li><em>From:</em> s001gmu#nova,wright.edu</li></ul>
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<UL><LI><EM>From:</EM> Vadim Tkachenko <vt#freehold,crocodile.org></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<LI><strong><A NAME="00882" HREF="msg00882.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Wed 25 Mar 1998, 05:02 GMT
</LI>
</ul>
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</LI>
<LI><strong><A NAME="00810" HREF="msg00810.html">World Persistence, flat files v/s DB v/s ??</A></strong>,
Ben Greear <a href="mailto:greear#cyberhighway,net">greear#cyberhighway,net</a>, Sun 22 Mar 1998, 05:39 GMT
<UL>
<LI><strong><A NAME="00811" HREF="msg00811.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Joel Dillon <a href="mailto:emily#cornholio,new.ox.ac.uk">emily#cornholio,new.ox.ac.uk</a>, Sun 22 Mar 1998, 12:30 GMT
<UL>
<LI><strong><A NAME="00820" HREF="msg00820.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Sun 22 Mar 1998, 18:34 GMT
<UL>
<LI><strong><A NAME="00824" HREF="msg00824.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Matt Chatterley <a href="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</a>, Sun 22 Mar 1998, 19:24 GMT
<UL>
<LI><strong><A NAME="00853" HREF="msg00853.html">World Persistence, flat files v/s DB v/s ??</A></strong>,
s001gmu <a href="mailto:s001gmu#nova,wright.edu">s001gmu#nova,wright.edu</a>, Mon 23 Mar 1998, 19:44 GMT
<UL>
<LI><strong><A NAME="00871" HREF="msg00871.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Joel Dillon <a href="mailto:emily#cornholio,new.ox.ac.uk">emily#cornholio,new.ox.ac.uk</a>, Tue 24 Mar 1998, 08:14 GMT
</LI>
<LI><strong><A NAME="00893" HREF="msg00893.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Matt Chatterley <a href="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</a>, Wed 25 Mar 1998, 08:40 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00881" HREF="msg00881.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Wed 25 Mar 1998, 04:53 GMT
</LI>
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