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diff --git a/system/doc/embedded/intro.xml b/system/doc/embedded/intro.xml new file mode 100644 index 0000000000..3eafffd6fa --- /dev/null +++ b/system/doc/embedded/intro.xml @@ -0,0 +1,95 @@ +<?xml version="1.0" encoding="latin1" ?> +<!DOCTYPE chapter SYSTEM "chapter.dtd"> + +<chapter> + <header> + <copyright> + <year>1997</year> + <year>2007</year> + <holder>Ericsson AB, All Rights Reserved</holder> + </copyright> + <legalnotice> + The contents of this file are subject to the Erlang Public License, + Version 1.1, (the "License"); you may not use this file except in + compliance with the License. You should have received a copy of the + Erlang Public License along with this software. If not, it can be + retrieved online at http://www.erlang.org/. + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and limitations + under the License. + + The Initial Developer of the Original Code is Ericsson AB. + </legalnotice> + + <title>Erlang on embedded systems</title> + <prepared>Fredrik Tillman</prepared> + <responsible></responsible> + <docno>ETX/B/SFP/TILLMAN:96-001</docno> + <approved></approved> + <checked></checked> + <date>1997-11-12</date> + <rev>PA1</rev> + <file>intro.sgml</file> + </header> + <p>This manual is a complement to the other manuals and describes how + to install, run and maintain Erlang on an embedded system. + </p> + <p>For more informaton about how to install and start Erlang read + XXXXXXXX. + </p> + + <section> + <title>Memory Usage</title> + <p>Solaris takes about 17 Mbyte of RAM on a system with 64 Mbyte of + total RAM. This leaves about 47 Mbyte for the applications. If + the system utilizes swapping, these figures cannot be improved + because unnecessary daemon processes are swapped out. However, + if swapping is disabled, or if the swap space is a precious + resource in the system, it becomes necessary to kill off + unnecessary daemon processes. + </p> + <p>The following start-scripts can be deleted to + prevent unnecessary daemons from starting: + </p> + <list type="bulleted"> + <item><c>/etc/rc2.d/S72autoinstall</c></item> + <item><c>/etc/rc2.d/S74autofs</c></item> + <item><c>/etc/rc2.d/S76nscd</c></item> + <item><c>/etc/rc2.d/S80PRESERVE</c></item> + <item><c>/etc/rc2.d/S80lp</c></item> + <item><c>/etc/rc2.d/S88sendmail</c></item> + <item><c>/etc/rc2.d/S92volmgt</c></item> + <item><c>/etc/rc2.d/S93cacheos.finish</c></item> + <item><c>/etc/rc3.d/S15nfs.server</c></item> + </list> + <p>More information is expected from Sun on how to modify the + kernel in order to reduce the memory consumption. This will be + performed by modifying the <c>/etc/system</c> file.</p> + </section> + + <section> + <title>Disk Space Usage</title> + <p>The disk space required by Solaris can be minimized by using the + Core User support installation. It requires about 80 Mbyte of + disk space. This installs only the minimum software required to + boot and run Solaris. The disk space can be further reduced by + deleting unnecessary individual files. However, unless disk + space is a critical resource the effort required and the risks + involved may not be justified.</p> + </section> + + <section> + <title>Other Issues</title> + <p>Future releases of OTP will include more information on how + Solaris can be configured for use with embedded systems to get + maximum performance. Issues which will be investigated include: + </p> + <list type="bulleted"> + <item>how disabling swapping affects the system</item> + <item>how locking processes in memory may yield performance benefits.</item> + </list> + </section> +</chapter> + |