<!-- MHonArc v2.4.4 --> <!--X-Subject: Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ?? --> <!--X-From-R13: X Q Znjerapr <pynjNhaqre.rate.ftv.pbz> --> <!--X-Date: Wed, 01 Apr 1998 00:49:50 +0000 --> <!--X-Message-Id: 199804010049.QAA01433#under,engr.sgi.com --> <!--X-Content-Type: text/plain --> <!--X-Reference: 351859F8.232E3D54#freehold,crocodile.org --> <!--X-Head-End--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <title>MUD-Dev message, Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</title> <!-- meta name="robots" content="noindex,nofollow" --> <link rev="made" href="mailto:claw#under,engr.sgi.com"> </head> <body background="/backgrounds/paperback.gif" bgcolor="#ffffff" text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000"> <font size="+4" color="#804040"> <strong><em>MUD-Dev<br>mailing list archive</em></strong> </font> <br> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] <br clear=all><hr> <!--X-Body-Begin--> <!--X-User-Header--> <!--X-User-Header-End--> <!--X-TopPNI--> Date: [ <a href="msg00923.html">Previous</a> | <a href="msg00925.html">Next</a> ] Thread: [ <a href="msg00881.html">Previous</a> | <a href="msg00827.html">Next</a> ] Index: [ <A HREF="author.html#00924">Author</A> | <A HREF="#00924">Date</A> | <A HREF="thread.html#00924">Thread</A> ] <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> <H1>Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</H1> <HR> <!--X-Subject-Header-End--> <!--X-Head-of-Message--> <UL> <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> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <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... </PRE> <!--X-Body-of-Message-End--> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <!--X-Follow-Ups-End--> <!--X-References--> <UL><LI><STRONG>References</STRONG>: <UL> <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> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00923.html">Re: [MUD-Dev] META: Broken mail headers</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00925.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00881.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00827.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00924"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00924"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> <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> </UL> </LI> </UL> </LI> </ul> </LI> </UL></BLOCKQUOTE> </ul> <hr> <center> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] </center> <hr> </body> </html>