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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>: J C Lawrence <<A HREF="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</A>></LI>
<LI><em>Date</em>: Tue, 31 Mar 1998 16:49:43 -0800</LI>
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<PRE>
On Tue, 24 Mar 1998 20:54:54 PST8PDT
Vadim Tkachenko<vt#freehold,crocodile.org> wrote:
> Matt Chatterley wrote:
>> 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've implemented a different approach in the Jukebox: there is an
> idle tracker service, and every time you start to process something
> or end to process something, you reset your time count on that
> service, so you'd be notified if there was a delay after LAST
> action. This way, you don't have to wait 6 hours.
> Funny, the implementation is amazingly simple: there is a concept of
> the semaphore which throws the exception unless posted, and all the
> idle handling is right here:
> while ( isEnabled() )
> {
> try {
> // do nothing here, I'm not interested in posts
> idleSem.waitFor( timeout );
> }
> catch ( SemaphoreTimedOutException ex )
> {
> report_timeout();
> }
> }
Note: This is very close to the standard SysV alarm signal handling.
<<Apologies for grieviously long quote>>
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------(*) Internet: claw#under,engr.sgi.com
...Honourary Member of Clan McFud -- Teamer's Avenging Monolith...
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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><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>World Persistence, flat files v/s DB v/s ??</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<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
<UL>
<LI><strong><A NAME="00924" HREF="msg00924.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Wed 01 Apr 1998, 00:49 GMT
</LI>
</UL>
</LI>
</ul>
</ul>
<LI><strong><A NAME="00827" HREF="msg00827.html">Re: [MUD-Dev] 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, 20:05 GMT
</LI>
</ul>
<LI><strong><A NAME="00812" HREF="msg00812.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, 12:44 GMT
<UL>
<LI><strong><A NAME="00814" HREF="msg00814.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, 12:50 GMT
<UL>
<LI><strong><A NAME="00815" HREF="msg00815.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, 13:40 GMT
</LI>
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