diff options
Diffstat (limited to 'doc/arm/Bv9ARM.ch02.html')
| -rw-r--r-- | doc/arm/Bv9ARM.ch02.html | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/doc/arm/Bv9ARM.ch02.html b/doc/arm/Bv9ARM.ch02.html new file mode 100644 index 0000000..efe0eb8 --- /dev/null +++ b/doc/arm/Bv9ARM.ch02.html @@ -0,0 +1,158 @@ +<!-- + - Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC") + - Copyright (C) 2000-2003 Internet Software Consortium. + - + - Permission to use, copy, modify, and distribute this software for any + - purpose with or without fee is hereby granted, provided that the above + - copyright notice and this permission notice appear in all copies. + - + - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + - PERFORMANCE OF THIS SOFTWARE. +--> +<!-- $Id: Bv9ARM.ch02.html,v 1.38 2008/09/12 01:12:32 tbox Exp $ --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Chapter 2. BIND Resource Requirements</title> +<meta name="generator" content="DocBook XSL Stylesheets V1.71.1"> +<link rel="start" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> +<link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> +<link rel="prev" href="Bv9ARM.ch01.html" title="Chapter 1. Introduction"> +<link rel="next" href="Bv9ARM.ch03.html" title="Chapter 3. Name Server Configuration"> +</head> +<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> +<div class="navheader"> +<table width="100%" summary="Navigation header"> +<tr><th colspan="3" align="center">Chapter 2. <acronym class="acronym">BIND</acronym> Resource Requirements</th></tr> +<tr> +<td width="20%" align="left"> +<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a> </td> +<th width="60%" align="center"> </th> +<td width="20%" align="right"> <a accesskey="n" href="Bv9ARM.ch03.html">Next</a> +</td> +</tr> +</table> +<hr> +</div> +<div class="chapter" lang="en"> +<div class="titlepage"><div><div><h2 class="title"> +<a name="Bv9ARM.ch02"></a>Chapter 2. <acronym class="acronym">BIND</acronym> Resource Requirements</h2></div></div></div> +<div class="toc"> +<p><b>Table of Contents</b></p> +<dl> +<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567580">Hardware requirements</a></span></dt> +<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567607">CPU Requirements</a></span></dt> +<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567620">Memory Requirements</a></span></dt> +<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567851">Name Server Intensive Environment Issues</a></span></dt> +<dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567862">Supported Operating Systems</a></span></dt> +</dl> +</div> +<div class="sect1" lang="en"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="id2567580"></a>Hardware requirements</h2></div></div></div> +<p> + <acronym class="acronym">DNS</acronym> hardware requirements have + traditionally been quite modest. + For many installations, servers that have been pensioned off from + active duty have performed admirably as <acronym class="acronym">DNS</acronym> servers. + </p> +<p> + The DNSSEC features of <acronym class="acronym">BIND</acronym> 9 + may prove to be quite + CPU intensive however, so organizations that make heavy use of these + features may wish to consider larger systems for these applications. + <acronym class="acronym">BIND</acronym> 9 is fully multithreaded, allowing + full utilization of + multiprocessor systems for installations that need it. + </p> +</div> +<div class="sect1" lang="en"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="id2567607"></a>CPU Requirements</h2></div></div></div> +<p> + CPU requirements for <acronym class="acronym">BIND</acronym> 9 range from + i486-class machines + for serving of static zones without caching, to enterprise-class + machines if you intend to process many dynamic updates and DNSSEC + signed zones, serving many thousands of queries per second. + </p> +</div> +<div class="sect1" lang="en"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="id2567620"></a>Memory Requirements</h2></div></div></div> +<p> + The memory of the server has to be large enough to fit the + cache and zones loaded off disk. The <span><strong class="command">max-cache-size</strong></span> + option can be used to limit the amount of memory used by the cache, + at the expense of reducing cache hit rates and causing more <acronym class="acronym">DNS</acronym> + traffic. + Additionally, if additional section caching + (<a href="Bv9ARM.ch06.html#acache" title="Additional Section Caching">the section called “Additional Section Caching”</a>) is enabled, + the <span><strong class="command">max-acache-size</strong></span> option can be used to + limit the amount + of memory used by the mechanism. + It is still good practice to have enough memory to load + all zone and cache data into memory — unfortunately, the best + way + to determine this for a given installation is to watch the name server + in operation. After a few weeks the server process should reach + a relatively stable size where entries are expiring from the cache as + fast as they are being inserted. + </p> +</div> +<div class="sect1" lang="en"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="id2567851"></a>Name Server Intensive Environment Issues</h2></div></div></div> +<p> + For name server intensive environments, there are two alternative + configurations that may be used. The first is where clients and + any second-level internal name servers query a main name server, which + has enough memory to build a large cache. This approach minimizes + the bandwidth used by external name lookups. The second alternative + is to set up second-level internal name servers to make queries + independently. + In this configuration, none of the individual machines needs to + have as much memory or CPU power as in the first alternative, but + this has the disadvantage of making many more external queries, + as none of the name servers share their cached data. + </p> +</div> +<div class="sect1" lang="en"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="id2567862"></a>Supported Operating Systems</h2></div></div></div> +<p> + ISC <acronym class="acronym">BIND</acronym> 9 compiles and runs on a large + number + of Unix-like operating systems and on NT-derived versions of + Microsoft Windows such as Windows 2000 and Windows XP. For an + up-to-date + list of supported systems, see the README file in the top level + directory + of the BIND 9 source distribution. + </p> +</div> +</div> +<div class="navfooter"> +<hr> +<table width="100%" summary="Navigation footer"> +<tr> +<td width="40%" align="left"> +<a accesskey="p" href="Bv9ARM.ch01.html">Prev</a> </td> +<td width="20%" align="center"> </td> +<td width="40%" align="right"> <a accesskey="n" href="Bv9ARM.ch03.html">Next</a> +</td> +</tr> +<tr> +<td width="40%" align="left" valign="top">Chapter 1. Introduction </td> +<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td> +<td width="40%" align="right" valign="top"> Chapter 3. Name Server Configuration</td> +</tr> +</table> +</div> +</body> +</html> |