<!-- MHonArc v2.4.4 --> <!--X-Subject: Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ?? --> <!--X-From-R13: Hnqvz Fxnpuraxb <igNserrubyq.pebpbqvyr.bet> --> <!--X-Date: Wed, 25 Mar 1998 05:02:14 +0000 --> <!--X-Message-Id: 351861F5.9647668D#freehold,crocodile.org --> <!--X-Content-Type: text/plain --> <!--X-Reference: 9803230245.8w3n@ami-cg.GraySage.Edmonton.AB.CA --> <!--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:vt#freehold,crocodile.org"> </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="msg00881.html">Previous</a> | <a href="msg00883.html">Next</a> ] Thread: [ <a href="msg00845.html">Previous</a> | <a href="msg00810.html">Next</a> ] Index: [ <A HREF="author.html#00882">Author</A> | <A HREF="#00882">Date</A> | <A HREF="thread.html#00882">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>: Vadim Tkachenko <<A HREF="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</A>></LI> <LI><em>Date</em>: Tue, 24 Mar 1998 19:46:29 -0600</LI> <LI><em>Sender</em>: <A HREF="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</A></LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> Chris Gray wrote: > > [Matt Chatterley:] > > :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. > > Why do you need to reboot at all? If your system doesn't leak memory, > and if it can save its DB to disk consistently while running, then there > is no need. If it crashes, restart with the latest consistent copy of the > DB. What I do is to flush the DB caches to disk periodically, and when > that is done copy the resulting files to a backup directory. If this > is done without allowing any other actual writes to the DB files (changes > to the DB are OK, so long as no disk writes are done), then you get a > consistent snapshot of the world. And one more reason to have the DB engine run in a different process space than the MUD engine - both become more stable. BTW, about JVM garbage collection - this solution seems to be better also, because Java gc chokes sometimes if even system has more then enough physical, not talking about virtual, memory available - I've seen javadoc dying on the Swing packages on the Linux box with 128M RAM - there was no swap used when it died. Just another reason. > Chris Gray cg#ami-cg,GraySage.Edmonton.AB.CA -- Still alive and smile stays on, Vadim Tkachenko <vt#freehold,crocodile.org> -- UNIX _is_ user friendly, he's just very picky about who his friends are </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="00836" HREF="msg00836.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> <UL><LI><EM>From:</EM> cg#ami-cg,GraySage.Edmonton.AB.CA (Chris Gray)</LI></UL></LI> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00881.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00883.html">Re: [MUD-Dev] Describe Concept</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00845.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00810.html">World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00882"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00882"><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>Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</STRONG>, <EM>(continued)</EM> <ul compact> <ul compact> <ul compact> <LI><strong><A NAME="00902" HREF="msg00902.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Thu 26 Mar 1998, 05:03 GMT </LI> </ul> </ul> <LI><strong><A NAME="00836" HREF="msg00836.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>, Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Mon 23 Mar 1998, 07:07 GMT <UL> <LI><strong><A NAME="00839" HREF="msg00839.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>, Ross Nicoll <a href="mailto:jrn#st-andrews,ac.uk">jrn#st-andrews,ac.uk</a>, Mon 23 Mar 1998, 08:09 GMT </LI> <LI><strong><A NAME="00845" HREF="msg00845.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>, Mon 23 Mar 1998, 18:05 GMT </LI> <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> </LI> </ul> </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 </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>