<!-- MHonArc v2.4.4 --> <!--X-Subject: Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ?? --> <!--X-From-R13: Xbry Rvyyba <rzvylNpbeaubyvb.arj.bk.np.hx> --> <!--X-Date: Sun, 22 Mar 1998 13:55:24 +0000 --> <!--X-Message-Id: Pine.LNX.3.95.980322135305.22652A-100000#cornholio,new.ox.ac.uk --> <!--X-Content-Type: text/plain --> <!--X-Reference: Pine.LNX.3.96.980322133804.527D-100000#mpc,dyn.ml.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:emily#cornholio,new.ox.ac.uk"> </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="msg00815.html">Previous</a> | <a href="msg00817.html">Next</a> ] Thread: [ <a href="msg00815.html">Previous</a> | <a href="msg00817.html">Next</a> ] Index: [ <A HREF="author.html#00816">Author</A> | <A HREF="#00816">Date</A> | <A HREF="thread.html#00816">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>: mud-dev <<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>: Joel Dillon <<A HREF="mailto:emily#cornholio,new.ox.ac.uk">emily#cornholio,new.ox.ac.uk</A>></LI> <LI><em>Date</em>: Sun, 22 Mar 1998 13:55:22 +0000 (GMT)</LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> > > > > The problem here is that you can't do nonblocking i/o in Java. So > > while you were waiting for input from 1 player the others would all be > > blocked ;) > > Hmm, I'm not sure that this would be a significant problem, BUT that > depends entirely on how much information players are sending via the > thread. If its more than a few bytes, then yes, ack, you'll be creating > your own lag-o-rama. It might be possible to get around this by spawning > threads from the socket-reading thread which processed and acted on the > information, and then removed themselves (I think this may be how I was > originally thinking). Well, the problem is that if you have one thread reading from all the sockets, and it tries to get a line (or a character, just as bad with most modern telnets that send line-by-line) from a given socket, it will block until it actually has a line. So if the player sits there for 5 minutes and doesn't type a command, the socket reading thread sits there waiting for the line and not reading from /any/ socket for 5 minutes. This is obviously sub-optimal ;) The normal way to do multi-user servers in Java is with threads, and for any number of users below 1000 (at the very least) using a thread per user should be safe. Jo </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="00815" HREF="msg00815.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> <UL><LI><EM>From:</EM> Matt Chatterley <matt#mpc,dyn.ml.org></LI></UL></LI> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00815.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00817.html">Another recruit for the list?</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00815.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00817.html">Another recruit for the list?</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00816"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00816"><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> <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 <UL> <LI><strong><A NAME="00816" HREF="msg00816.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, 13:55 GMT </LI> <LI><strong><A NAME="00817" HREF="msg00817.html">Another recruit for the list?</A></strong>, Joel Dillon <a href="mailto:emily#cornholio,new.ox.ac.uk">emily#cornholio,new.ox.ac.uk</a>, Sun 22 Mar 1998, 15:29 GMT </LI> <LI><strong><A NAME="00855" HREF="msg00855.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>, Mon 23 Mar 1998, 20:38 GMT <UL> <LI><strong><A NAME="00872" HREF="msg00872.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, 08:16 GMT <UL> <LI><strong><A NAME="00879" HREF="msg00879.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 25 Mar 1998, 00:17 GMT </LI> </UL> </LI> </UL> </LI> </UL> </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>