1*00b67f09SDavid van Moolenbroek<!-- 2*00b67f09SDavid van Moolenbroek - Copyright (C) 2004-2015 Internet Systems Consortium, Inc. ("ISC") 3*00b67f09SDavid van Moolenbroek - Copyright (C) 2000-2003 Internet Software Consortium. 4*00b67f09SDavid van Moolenbroek - 5*00b67f09SDavid van Moolenbroek - Permission to use, copy, modify, and/or distribute this software for any 6*00b67f09SDavid van Moolenbroek - purpose with or without fee is hereby granted, provided that the above 7*00b67f09SDavid van Moolenbroek - copyright notice and this permission notice appear in all copies. 8*00b67f09SDavid van Moolenbroek - 9*00b67f09SDavid van Moolenbroek - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10*00b67f09SDavid van Moolenbroek - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11*00b67f09SDavid van Moolenbroek - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12*00b67f09SDavid van Moolenbroek - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13*00b67f09SDavid van Moolenbroek - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14*00b67f09SDavid van Moolenbroek - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15*00b67f09SDavid van Moolenbroek - PERFORMANCE OF THIS SOFTWARE. 16*00b67f09SDavid van Moolenbroek--> 17*00b67f09SDavid van Moolenbroek<!-- Id --> 18*00b67f09SDavid van Moolenbroek<html> 19*00b67f09SDavid van Moolenbroek<head> 20*00b67f09SDavid van Moolenbroek<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 21*00b67f09SDavid van Moolenbroek<title>Chapter�2.�BIND Resource Requirements</title> 22*00b67f09SDavid van Moolenbroek<meta name="generator" content="DocBook XSL Stylesheets V1.71.1"> 23*00b67f09SDavid van Moolenbroek<link rel="start" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> 24*00b67f09SDavid van Moolenbroek<link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> 25*00b67f09SDavid van Moolenbroek<link rel="prev" href="Bv9ARM.ch01.html" title="Chapter�1.�Introduction"> 26*00b67f09SDavid van Moolenbroek<link rel="next" href="Bv9ARM.ch03.html" title="Chapter�3.�Name Server Configuration"> 27*00b67f09SDavid van Moolenbroek</head> 28*00b67f09SDavid van Moolenbroek<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 29*00b67f09SDavid van Moolenbroek<div class="navheader"> 30*00b67f09SDavid van Moolenbroek<table width="100%" summary="Navigation header"> 31*00b67f09SDavid van Moolenbroek<tr><th colspan="3" align="center">Chapter�2.�<acronym class="acronym">BIND</acronym> Resource Requirements</th></tr> 32*00b67f09SDavid van Moolenbroek<tr> 33*00b67f09SDavid van Moolenbroek<td width="20%" align="left"> 34*00b67f09SDavid van Moolenbroek<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a>�</td> 35*00b67f09SDavid van Moolenbroek<th width="60%" align="center">�</th> 36*00b67f09SDavid van Moolenbroek<td width="20%" align="right">�<a accesskey="n" href="Bv9ARM.ch03.html">Next</a> 37*00b67f09SDavid van Moolenbroek</td> 38*00b67f09SDavid van Moolenbroek</tr> 39*00b67f09SDavid van Moolenbroek</table> 40*00b67f09SDavid van Moolenbroek<hr> 41*00b67f09SDavid van Moolenbroek</div> 42*00b67f09SDavid van Moolenbroek<div class="chapter" lang="en"> 43*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title"> 44*00b67f09SDavid van Moolenbroek<a name="Bv9ARM.ch02"></a>Chapter�2.�<acronym class="acronym">BIND</acronym> Resource Requirements</h2></div></div></div> 45*00b67f09SDavid van Moolenbroek<div class="toc"> 46*00b67f09SDavid van Moolenbroek<p><b>Table of Contents</b></p> 47*00b67f09SDavid van Moolenbroek<dl> 48*00b67f09SDavid van Moolenbroek<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567685">Hardware requirements</a></span></dt> 49*00b67f09SDavid van Moolenbroek<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567712">CPU Requirements</a></span></dt> 50*00b67f09SDavid van Moolenbroek<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567793">Memory Requirements</a></span></dt> 51*00b67f09SDavid van Moolenbroek<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567819">Name Server Intensive Environment Issues</a></span></dt> 52*00b67f09SDavid van Moolenbroek<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567830">Supported Operating Systems</a></span></dt> 53*00b67f09SDavid van Moolenbroek</dl> 54*00b67f09SDavid van Moolenbroek</div> 55*00b67f09SDavid van Moolenbroek<div class="sect1" lang="en"> 56*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 57*00b67f09SDavid van Moolenbroek<a name="id2567685"></a>Hardware requirements</h2></div></div></div> 58*00b67f09SDavid van Moolenbroek<p> 59*00b67f09SDavid van Moolenbroek <acronym class="acronym">DNS</acronym> hardware requirements have 60*00b67f09SDavid van Moolenbroek traditionally been quite modest. 61*00b67f09SDavid van Moolenbroek For many installations, servers that have been pensioned off from 62*00b67f09SDavid van Moolenbroek active duty have performed admirably as <acronym class="acronym">DNS</acronym> servers. 63*00b67f09SDavid van Moolenbroek </p> 64*00b67f09SDavid van Moolenbroek<p> 65*00b67f09SDavid van Moolenbroek The DNSSEC features of <acronym class="acronym">BIND</acronym> 9 66*00b67f09SDavid van Moolenbroek may prove to be quite 67*00b67f09SDavid van Moolenbroek CPU intensive however, so organizations that make heavy use of these 68*00b67f09SDavid van Moolenbroek features may wish to consider larger systems for these applications. 69*00b67f09SDavid van Moolenbroek <acronym class="acronym">BIND</acronym> 9 is fully multithreaded, allowing 70*00b67f09SDavid van Moolenbroek full utilization of 71*00b67f09SDavid van Moolenbroek multiprocessor systems for installations that need it. 72*00b67f09SDavid van Moolenbroek </p> 73*00b67f09SDavid van Moolenbroek</div> 74*00b67f09SDavid van Moolenbroek<div class="sect1" lang="en"> 75*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 76*00b67f09SDavid van Moolenbroek<a name="id2567712"></a>CPU Requirements</h2></div></div></div> 77*00b67f09SDavid van Moolenbroek<p> 78*00b67f09SDavid van Moolenbroek CPU requirements for <acronym class="acronym">BIND</acronym> 9 range from 79*00b67f09SDavid van Moolenbroek i486-class machines 80*00b67f09SDavid van Moolenbroek for serving of static zones without caching, to enterprise-class 81*00b67f09SDavid van Moolenbroek machines if you intend to process many dynamic updates and DNSSEC 82*00b67f09SDavid van Moolenbroek signed zones, serving many thousands of queries per second. 83*00b67f09SDavid van Moolenbroek </p> 84*00b67f09SDavid van Moolenbroek</div> 85*00b67f09SDavid van Moolenbroek<div class="sect1" lang="en"> 86*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 87*00b67f09SDavid van Moolenbroek<a name="id2567793"></a>Memory Requirements</h2></div></div></div> 88*00b67f09SDavid van Moolenbroek<p> 89*00b67f09SDavid van Moolenbroek The memory of the server has to be large enough to fit the 90*00b67f09SDavid van Moolenbroek cache and zones loaded off disk. The <span><strong class="command">max-cache-size</strong></span> 91*00b67f09SDavid van Moolenbroek option can be used to limit the amount of memory used by the cache, 92*00b67f09SDavid van Moolenbroek at the expense of reducing cache hit rates and causing more <acronym class="acronym">DNS</acronym> 93*00b67f09SDavid van Moolenbroek traffic. 94*00b67f09SDavid van Moolenbroek Additionally, if additional section caching 95*00b67f09SDavid van Moolenbroek (<a href="Bv9ARM.ch06.html#acache" title="Additional Section Caching">the section called “Additional Section Caching”</a>) is enabled, 96*00b67f09SDavid van Moolenbroek the <span><strong class="command">max-acache-size</strong></span> option can be used to 97*00b67f09SDavid van Moolenbroek limit the amount 98*00b67f09SDavid van Moolenbroek of memory used by the mechanism. 99*00b67f09SDavid van Moolenbroek It is still good practice to have enough memory to load 100*00b67f09SDavid van Moolenbroek all zone and cache data into memory — unfortunately, the best 101*00b67f09SDavid van Moolenbroek way 102*00b67f09SDavid van Moolenbroek to determine this for a given installation is to watch the name server 103*00b67f09SDavid van Moolenbroek in operation. After a few weeks the server process should reach 104*00b67f09SDavid van Moolenbroek a relatively stable size where entries are expiring from the cache as 105*00b67f09SDavid van Moolenbroek fast as they are being inserted. 106*00b67f09SDavid van Moolenbroek </p> 107*00b67f09SDavid van Moolenbroek</div> 108*00b67f09SDavid van Moolenbroek<div class="sect1" lang="en"> 109*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 110*00b67f09SDavid van Moolenbroek<a name="id2567819"></a>Name Server Intensive Environment Issues</h2></div></div></div> 111*00b67f09SDavid van Moolenbroek<p> 112*00b67f09SDavid van Moolenbroek For name server intensive environments, there are two alternative 113*00b67f09SDavid van Moolenbroek configurations that may be used. The first is where clients and 114*00b67f09SDavid van Moolenbroek any second-level internal name servers query a main name server, which 115*00b67f09SDavid van Moolenbroek has enough memory to build a large cache. This approach minimizes 116*00b67f09SDavid van Moolenbroek the bandwidth used by external name lookups. The second alternative 117*00b67f09SDavid van Moolenbroek is to set up second-level internal name servers to make queries 118*00b67f09SDavid van Moolenbroek independently. 119*00b67f09SDavid van Moolenbroek In this configuration, none of the individual machines needs to 120*00b67f09SDavid van Moolenbroek have as much memory or CPU power as in the first alternative, but 121*00b67f09SDavid van Moolenbroek this has the disadvantage of making many more external queries, 122*00b67f09SDavid van Moolenbroek as none of the name servers share their cached data. 123*00b67f09SDavid van Moolenbroek </p> 124*00b67f09SDavid van Moolenbroek</div> 125*00b67f09SDavid van Moolenbroek<div class="sect1" lang="en"> 126*00b67f09SDavid van Moolenbroek<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 127*00b67f09SDavid van Moolenbroek<a name="id2567830"></a>Supported Operating Systems</h2></div></div></div> 128*00b67f09SDavid van Moolenbroek<p> 129*00b67f09SDavid van Moolenbroek ISC <acronym class="acronym">BIND</acronym> 9 compiles and runs on a large 130*00b67f09SDavid van Moolenbroek number 131*00b67f09SDavid van Moolenbroek of Unix-like operating systems and on 132*00b67f09SDavid van Moolenbroek Microsoft Windows Server 2003 and 2008, and Windows XP and Vista. 133*00b67f09SDavid van Moolenbroek For an up-to-date 134*00b67f09SDavid van Moolenbroek list of supported systems, see the README file in the top level 135*00b67f09SDavid van Moolenbroek directory 136*00b67f09SDavid van Moolenbroek of the BIND 9 source distribution. 137*00b67f09SDavid van Moolenbroek </p> 138*00b67f09SDavid van Moolenbroek</div> 139*00b67f09SDavid van Moolenbroek</div> 140*00b67f09SDavid van Moolenbroek<div class="navfooter"> 141*00b67f09SDavid van Moolenbroek<hr> 142*00b67f09SDavid van Moolenbroek<table width="100%" summary="Navigation footer"> 143*00b67f09SDavid van Moolenbroek<tr> 144*00b67f09SDavid van Moolenbroek<td width="40%" align="left"> 145*00b67f09SDavid van Moolenbroek<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a>�</td> 146*00b67f09SDavid van Moolenbroek<td width="20%" align="center">�</td> 147*00b67f09SDavid van Moolenbroek<td width="40%" align="right">�<a accesskey="n" href="Bv9ARM.ch03.html">Next</a> 148*00b67f09SDavid van Moolenbroek</td> 149*00b67f09SDavid van Moolenbroek</tr> 150*00b67f09SDavid van Moolenbroek<tr> 151*00b67f09SDavid van Moolenbroek<td width="40%" align="left" valign="top">Chapter�1.�Introduction�</td> 152*00b67f09SDavid van Moolenbroek<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td> 153*00b67f09SDavid van Moolenbroek<td width="40%" align="right" valign="top">�Chapter�3.�Name Server Configuration</td> 154*00b67f09SDavid van Moolenbroek</tr> 155*00b67f09SDavid van Moolenbroek</table> 156*00b67f09SDavid van Moolenbroek</div> 157*00b67f09SDavid van Moolenbroek<p style="text-align: center;">BIND 9.10.2-P4</p> 158*00b67f09SDavid van Moolenbroek</body> 159*00b67f09SDavid van Moolenbroek</html> 160