159 lines
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159 lines
7.5 KiB
HTML
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Chapter 2. BIND Resource Requirements</title>
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<link rel="start" 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 1. Introduction">
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<link rel="next" href="Bv9ARM.ch03.html" title="Chapter 3. Name Server Configuration">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table width="100%" summary="Navigation header">
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<tr><th colspan="3" align="center">Chapter 2. <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> </td>
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<th width="60%" align="center"> </th>
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<td width="20%" align="right"> <a accesskey="n" href="Bv9ARM.ch03.html">Next</a>
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</td>
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<hr>
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<div class="chapter" lang="en">
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<div class="titlepage"><div><div><h2 class="title">
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<a name="Bv9ARM.ch02"></a>Chapter 2. <acronym class="acronym">BIND</acronym> Resource Requirements</h2></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>
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<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567594">Hardware requirements</a></span></dt>
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<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567621">CPU Requirements</a></span></dt>
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<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567634">Memory Requirements</a></span></dt>
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<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567729">Name Server Intensive Environment Issues</a></span></dt>
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<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567739">Supported Operating Systems</a></span></dt>
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</dl>
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</div>
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<div class="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id2567594"></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="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id2567621"></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="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id2567634"></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><strong class="command">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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Additionally, if additional section caching
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(<a href="Bv9ARM.ch06.html#acache" title="Additional Section Caching">the section called “Additional Section Caching”</a>) is enabled,
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the <span><strong class="command">max-acache-size</strong></span> option can be used to
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limit the amount
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of memory used by the mechanism.
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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="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id2567729"></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="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id2567739"></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> </td>
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<td width="20%" align="center"> </td>
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<td width="40%" align="right"> <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 1. Introduction </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"> Chapter 3. Name Server Configuration</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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