<HEAD><TITLE>discuss@charon: [916] in "Coldmud discussion meeting"</TITLE>
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<HR><H2>Re: [COLD] More efficient diskbasing</H2>
<H3>daemon@ATHENA.MIT.EDU (Wed Feb  7 20:19:12 1996
)</H3>
<PRE>
Date: Wed, 7 Feb 1996 17:54:45 -0700 (MST)
From: "Terrence M. Drozdowski" &lt;xymox@mcmuse.mc.maricopa.edu&gt;
To: coldstuff@cold.org
In-Reply-To: &lt;199602072049.VAA29595@regoc.srce.hr&gt;
Reply-To: coldstuff@cold.org

On Wed, 7 Feb 1996, Miroslav Silovic wrote:

&gt; 
&gt; It just occured to me that most of the checkpointing time is wasted on
&gt; cp - the database has to be copied clean. I thought of a way to keep the
&gt; database clean 95% of the time. This would also make the server a lot safer.
&gt; 
&gt; The thing that would have to be modified is the cache handling. I suggest
&gt; that modified objects could be kept in RAM till the next checkpoint, and
&gt; the checkpoint would be when a) 30 minutes (or whatever) passes, or b)
&gt; more than 75% of the cached objects are modified. Then we could dump
&gt; just the modified objects, and the database would be non-clean only during
&gt; the dump, the cp being unnecessary.
&gt; 
&gt; What do you all think about this?
&gt; 
&gt; 	Jenner
&gt; 

This sounds good, but how much RAM would this eat up?  Would it inflate 
dramaticly or unnoticably?  On a busy coldmud, I'd assume that if you 
have a lot of object creation, you'd have more frequent checkpointing.  
Though, that's just how it seems to me...
xymox

--------------------
Terrence Drozdowski|"Statism is statism by any name the same, apathy is suicide
xymox@mcmuse.mc.maricopa.edu|and we will bare the blame." -1994 PsykoSonik
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</PRE>
