2017-09-11 20:16:47 -04:00
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2018-01-22 19:38:08 -05:00
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- Copyright (C) 2000-2018 Internet Systems Consortium, Inc. ("ISC")
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2017-09-11 20:16:47 -04:00
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- This Source Code Form is subject to the terms of the Mozilla Public
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Chapter<EFBFBD>2.<2E>BIND Resource Requirements</title>
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<link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
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<link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
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<link rel="prev" href="Bv9ARM.ch01.html" title="Chapter<65>1.<2E>Introduction">
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<link rel="next" href="Bv9ARM.ch03.html" title="Chapter<65>3.<2E>Name Server Configuration">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<div class="navheader">
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<table width="100%" summary="Navigation header">
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<tr><th colspan="3" align="center">Chapter<EFBFBD>2.<2E><acronym class="acronym">BIND</acronym> Resource Requirements</th></tr>
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<tr>
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<td width="20%" align="left">
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<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a><EFBFBD></td>
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<th width="60%" align="center"><EFBFBD></th>
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<td width="20%" align="right"><EFBFBD><a accesskey="n" href="Bv9ARM.ch03.html">Next</a>
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</td>
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</tr>
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</table>
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<hr>
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</div>
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<div class="chapter">
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<div class="titlepage"><div><div><h1 class="title">
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<a name="Bv9ARM.ch02"></a>Chapter<EFBFBD>2.<2E><acronym class="acronym">BIND</acronym> Resource Requirements</h1></div></div></div>
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<div class="toc">
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<p><b>Table of Contents</b></p>
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<dl class="toc">
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<dt><span class="section"><a href="Bv9ARM.ch02.html#hw_req">Hardware requirements</a></span></dt>
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<dt><span class="section"><a href="Bv9ARM.ch02.html#cpu_req">CPU Requirements</a></span></dt>
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<dt><span class="section"><a href="Bv9ARM.ch02.html#mem_req">Memory Requirements</a></span></dt>
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<dt><span class="section"><a href="Bv9ARM.ch02.html#intensive_env">Name Server Intensive Environment Issues</a></span></dt>
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<dt><span class="section"><a href="Bv9ARM.ch02.html#supported_os">Supported Operating Systems</a></span></dt>
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</dl>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="hw_req"></a>Hardware requirements</h2></div></div></div>
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<p>
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<acronym class="acronym">DNS</acronym> hardware requirements have
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traditionally been quite modest.
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For many installations, servers that have been pensioned off from
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active duty have performed admirably as <acronym class="acronym">DNS</acronym> servers.
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</p>
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<p>
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The DNSSEC features of <acronym class="acronym">BIND</acronym> 9
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may prove to be quite
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CPU intensive however, so organizations that make heavy use of these
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features may wish to consider larger systems for these applications.
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<acronym class="acronym">BIND</acronym> 9 is fully multithreaded, allowing
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full utilization of
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multiprocessor systems for installations that need it.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="cpu_req"></a>CPU Requirements</h2></div></div></div>
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<p>
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CPU requirements for <acronym class="acronym">BIND</acronym> 9 range from
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i486-class machines
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for serving of static zones without caching, to enterprise-class
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machines if you intend to process many dynamic updates and DNSSEC
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signed zones, serving many thousands of queries per second.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="mem_req"></a>Memory Requirements</h2></div></div></div>
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<p>
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The memory of the server has to be large enough to fit the
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cache and zones loaded off disk. The <span class="command"><strong>max-cache-size</strong></span>
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option can be used to limit the amount of memory used by the cache,
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at the expense of reducing cache hit rates and causing more <acronym class="acronym">DNS</acronym>
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traffic.
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It is still good practice to have enough memory to load
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all zone and cache data into memory — unfortunately, the best
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way
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to determine this for a given installation is to watch the name server
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in operation. After a few weeks the server process should reach
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a relatively stable size where entries are expiring from the cache as
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fast as they are being inserted.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="intensive_env"></a>Name Server Intensive Environment Issues</h2></div></div></div>
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<p>
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For name server intensive environments, there are two alternative
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configurations that may be used. The first is where clients and
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any second-level internal name servers query a main name server, which
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has enough memory to build a large cache. This approach minimizes
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the bandwidth used by external name lookups. The second alternative
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is to set up second-level internal name servers to make queries
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independently.
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In this configuration, none of the individual machines needs to
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have as much memory or CPU power as in the first alternative, but
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this has the disadvantage of making many more external queries,
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as none of the name servers share their cached data.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="supported_os"></a>Supported Operating Systems</h2></div></div></div>
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<p>
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ISC <acronym class="acronym">BIND</acronym> 9 compiles and runs on a large
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number
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of Unix-like operating systems and on
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Microsoft Windows Server 2003 and 2008, and Windows XP and Vista.
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For an up-to-date
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list of supported systems, see the README file in the top level
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directory
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of the BIND 9 source distribution.
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr>
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left">
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<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a><EFBFBD></td>
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<td width="20%" align="center"><EFBFBD></td>
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<td width="40%" align="right"><EFBFBD><a accesskey="n" href="Bv9ARM.ch03.html">Next</a>
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</td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter<EFBFBD>1.<2E>Introduction<6F></td>
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<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
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<td width="40%" align="right" valign="top"><EFBFBD>Chapter<EFBFBD>3.<2E>Name Server Configuration</td>
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</tr>
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</table>
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</div>
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2018-01-23 20:08:12 -05:00
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<p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.13.0-dev</p>
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2017-09-11 20:16:47 -04:00
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</body>
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</html>
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