<HTML ><HEAD ><TITLE >Internet/Intranet Linux server</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.63 "><LINK REL="HOME" TITLE="HP HOWTO" HREF="index.html"><LINK REL="UP" TITLE=" Solutions and Sizing " HREF="sizing.html"><LINK REL="PREVIOUS" TITLE=" Solutions and Sizing " HREF="sizing.html"><LINK REL="NEXT" TITLE="Linux as computing server" HREF="linux-computing.html"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Author" CONTENT="Bruno Cornec"><META NAME="KeyWords" CONTENT="Linux,HP,HP-UX,Hewlett,Packard"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >HP HOWTO: Configuration Guide and Use of HP Products under Linux (Version 0.94)</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sizing.html" ><IMG SRC="images/prev.png" BORDER="0" ALT="Previous"></A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 4. Solutions and Sizing</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="linux-computing.html" ><IMG SRC="images/next.png" BORDER="0" ALT="Next"></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="LINUX-INTRANET" >4.2. Internet/Intranet Linux server</A ></H1 ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN6698" >4.2.1. Web Server</A ></H2 ><P > The Web service uses 2.5 MB of RAM, in static mode (simple HTML pages) and 5 MB of RAM in dynamic mode (HTML pages generated from perl, PHP, ...) per user. The disk space needed is function of the nature of the server, knowing that most of the consumption comes from images. Processor resources used are important, thus it could be useful to consider the increase in frequency and the addition of processors, because this type of traffic could be quite well done in parallel. With Apache 2.0 and the support of threads, it will become even more obvious. We will priviledge also the I/O speed with Ultra 2 LVD SCSI at 80 MB/s, if the budget allows it, and 10.000 RPM disks. </P ><DIV CLASS="TABLE" ><A NAME="AEN6701" ></A ><P ><B >Table 4-3. Sizing of a static Web server</B ></P ><TABLE BORDER="1" WIDTH="100%" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >Simultaneous users</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >RAM size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Disk size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Machine example</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" > 1 - 100</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >256 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >100 - 500</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >1 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LC2000 Bi-processor</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >500 - 1000</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >2 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LH6000 Quadri-processor</TD ></TR ></TBODY ></TABLE ></DIV ><DIV CLASS="TABLE" ><A NAME="AEN6730" ></A ><P ><B >Table 4-4. Sizing of a dynamic Web server</B ></P ><TABLE BORDER="1" WIDTH="100%" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >Simultaneous users</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >RAM size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Disk size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Machine example</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" > 1 - 100</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >512 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >100 - 500</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >2 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LC2000 Bi-processor</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >500 - 1000</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >4 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >18 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LH6000 Quadri-processor</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN6759" >4.2.2. Mail Server</A ></H2 ><P > Generally, this machine is used as both SMTP (sending and reception of messages) and POP/IMAP server (keeper of messages and manager of client accesses). The SMTP Mail service uses 2 MB of RAM per user. The POP/IMAP Mail service uses 2 MB of RAM per user. The disk space needed becomes more and more important as long as attachments (images, various documents) take the greatest place in exchanges via e-mail. We consider in that case that an average mail box size is 50 MB. Processor resources used are important, thus it could be useful to consider the increase in frequency and the addition of processors, because this type of traffic could be quite well done in parallel. </P ><DIV CLASS="TABLE" ><A NAME="AEN6762" ></A ><P ><B >Table 4-5. Sizing of an e-mail server</B ></P ><TABLE BORDER="1" WIDTH="100%" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >Simultaneous users</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >RAM size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Disk size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Machine example</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" > 1 - 100</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >400 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >100 - 500</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >2 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >27 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LC2000 Bi-processor</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >500 - 1000</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >4 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >54 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >LH6000 Quadri-processor</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN6791" >4.2.3. Firewall/Proxy/Web-Cache server</A ></H2 ><P > Generally, this machine is both a Firewall server, a proxy (in both directions) and a cache for the Web because all requests go through it. The Firewall service uses 1 MB of RAM. The Proxy service uses 0.3 MB per incoming relay. The Web cache service uses 0.5 MB per user. The disk space needed is function of the parameters of the cache Web server. In that case, we consider 20 MB per user. Processor resources used are important, due to the analysis of IP packets. Thus it could be useful to consider the increase in frequency. </P ><DIV CLASS="TABLE" ><A NAME="AEN6794" ></A ><P ><B >Table 4-6. Sizing of a Firewall/Proxy/Web-Cache server</B ></P ><TABLE BORDER="1" WIDTH="100%" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >Simultaneous users</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >RAM size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Disk size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Machine example</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" > 1 - 100</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >128 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >100 - 500</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >512 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >18 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >500 - 1000</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >1 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >27 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN6823" >4.2.4. Directory server</A ></H2 ><P > Generally, this machine use a software like <A HREF="http://www.openldap.org" TARGET="_top" >OpenLDAP</A > to fulfill its goals. The LDAP service uses 1 MB of RAM and 10 kB of RAM per user. The disk space needed is of the same kind, so 10 kB per user. Processor resources used are moderated. </P ><DIV CLASS="TABLE" ><A NAME="AEN6827" ></A ><P ><B >Table 4-7. Sizing of a LDAP server</B ></P ><TABLE BORDER="1" WIDTH="100%" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >Simultaneous users</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >RAM size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Disk size</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >Machine example</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" > 1 - 100</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >64 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >100 - 500</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >64 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ><TR ><TD WIDTH="40%" ALIGN="LEFT" VALIGN="TOP" >500 - 1000</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >128 MB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >9 GB</TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="TOP" >E800</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sizing.html" ><IMG SRC="images/prev.png" BORDER="0" ALT="Previous"></A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ><IMG SRC="images/home.png" BORDER="0" ALT="Home"></A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="linux-computing.html" ><IMG SRC="images/next.png" BORDER="0" ALT="Next"></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Solutions and Sizing</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sizing.html" ><IMG SRC="images/up.png" BORDER="0" ALT="Up"></A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Linux as computing server</TD ></TR ></TABLE ></DIV ></BODY ></HTML >