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-<HTML
-><HEAD
-><TITLE
->BIND Resource Requirements</TITLE
-><META
-NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.73
-"><LINK
-REL="HOME"
-TITLE="BIND 9 Administrator Reference Manual"
-HREF="Bv9ARM.html"><LINK
-REL="PREVIOUS"
-TITLE="Introduction "
-HREF="Bv9ARM.ch01.html"><LINK
-REL="NEXT"
-TITLE="Nameserver Configuration"
-HREF="Bv9ARM.ch03.html"></HEAD
-><BODY
-CLASS="chapter"
-BGCOLOR="#FFFFFF"
-TEXT="#000000"
-LINK="#0000FF"
-VLINK="#840084"
-ALINK="#0000FF"
-><DIV
-CLASS="NAVHEADER"
-><TABLE
-SUMMARY="Header navigation table"
-WIDTH="100%"
-BORDER="0"
-CELLPADDING="0"
-CELLSPACING="0"
-><TR
-><TH
-COLSPAN="3"
-ALIGN="center"
->BIND 9 Administrator Reference Manual</TH
-></TR
-><TR
-><TD
-WIDTH="10%"
-ALIGN="left"
-VALIGN="bottom"
-><A
-HREF="Bv9ARM.ch01.html"
-ACCESSKEY="P"
->Prev</A
-></TD
-><TD
-WIDTH="80%"
-ALIGN="center"
-VALIGN="bottom"
-></TD
-><TD
-WIDTH="10%"
-ALIGN="right"
-VALIGN="bottom"
-><A
-HREF="Bv9ARM.ch03.html"
-ACCESSKEY="N"
->Next</A
-></TD
-></TR
-></TABLE
-><HR
-ALIGN="LEFT"
-WIDTH="100%"></DIV
-><DIV
-CLASS="chapter"
-><H1
-><A
-NAME="ch02"
->Chapter 2. <SPAN
-CLASS="acronym"
->BIND</SPAN
-> Resource Requirements</A
-></H1
-><DIV
-CLASS="TOC"
-><DL
-><DT
-><B
->Table of Contents</B
-></DT
-><DT
->2.1. <A
-HREF="Bv9ARM.ch02.html#AEN223"
->Hardware requirements</A
-></DT
-><DT
->2.2. <A
-HREF="Bv9ARM.ch02.html#AEN231"
->CPU Requirements</A
-></DT
-><DT
->2.3. <A
-HREF="Bv9ARM.ch02.html#AEN235"
->Memory Requirements</A
-></DT
-><DT
->2.4. <A
-HREF="Bv9ARM.ch02.html#AEN240"
->Nameserver Intensive Environment Issues</A
-></DT
-><DT
->2.5. <A
-HREF="Bv9ARM.ch02.html#AEN243"
->Supported Operating Systems</A
-></DT
-></DL
-></DIV
-><DIV
-CLASS="sect1"
-><H1
-CLASS="sect1"
-><A
-NAME="AEN223"
->2.1. Hardware requirements</A
-></H1
-><P
-><SPAN
-CLASS="acronym"
->DNS</SPAN
-> hardware requirements have traditionally been quite modest.
-For many installations, servers that have been pensioned off from
-active duty have performed admirably as <SPAN
-CLASS="acronym"
->DNS</SPAN
-> servers.</P
-><P
->The DNSSEC and IPv6 features of <SPAN
-CLASS="acronym"
->BIND</SPAN
-> 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.
-<SPAN
-CLASS="acronym"
->BIND</SPAN
-> 9 is now fully multithreaded, allowing full utilization of
-multiprocessor systems for installations that need it.</P
-></DIV
-><DIV
-CLASS="sect1"
-><H1
-CLASS="sect1"
-><A
-NAME="AEN231"
->2.2. CPU Requirements</A
-></H1
-><P
->CPU requirements for <SPAN
-CLASS="acronym"
->BIND</SPAN
-> 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"
-><H1
-CLASS="sect1"
-><A
-NAME="AEN235"
->2.3. Memory Requirements</A
-></H1
-><P
->The memory of the server has to be large enough to fit the
-cache and zones loaded off disk. The <B
-CLASS="command"
->max-cache-size</B
->
-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 <SPAN
-CLASS="acronym"
->DNS</SPAN
->
-traffic. It is still good practice to have enough memory to load
-all zone and cache data into memory &#8212; unfortunately, the best way
-to determine this for a given installation is to watch the nameserver
-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. Ideally, the resource limits should
-be set higher than this stable size.</P
-></DIV
-><DIV
-CLASS="sect1"
-><H1
-CLASS="sect1"
-><A
-NAME="AEN240"
->2.4. Nameserver Intensive Environment Issues</A
-></H1
-><P
->For nameserver intensive environments, there are two alternative
-configurations that may be used. The first is where clients and
-any second-level internal nameservers query a main nameserver, 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 nameservers 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 nameservers share their cached data.</P
-></DIV
-><DIV
-CLASS="sect1"
-><H1
-CLASS="sect1"
-><A
-NAME="AEN243"
->2.5. Supported Operating Systems</A
-></H1
-><P
->ISC <SPAN
-CLASS="acronym"
->BIND</SPAN
-> 9 compiles and runs on the following operating
-systems:</P
-><P
-></P
-><UL
-><LI
-><P
->IBM AIX 4.3</P
-></LI
-><LI
-><P
->Compaq Digital/Tru64 UNIX 4.0D</P
-></LI
-><LI
-><P
->Compaq Digital/Tru64 UNIX 5 (with IPv6 EAK)</P
-></LI
-><LI
-><P
->HP HP-UX 11</P
-></LI
-><LI
-><P
->IRIX64 6.5</P
-></LI
-><LI
-><P
->Sun Solaris 2.6, 7, 8</P
-></LI
-><LI
-><P
->NetBSD 1.5 (with unproven-pthreads 0.17)</P
-></LI
-><LI
-><P
->FreeBSD 3.4-STABLE, 3.5, 4.0, 4.1</P
-></LI
-><LI
-><P
->Red Hat Linux 6.0, 6.1, 6.2, 7.0</P
-></LI
-></UL
-></DIV
-></DIV
-><DIV
-CLASS="NAVFOOTER"
-><HR
-ALIGN="LEFT"
-WIDTH="100%"><TABLE
-SUMMARY="Footer navigation table"
-WIDTH="100%"
-BORDER="0"
-CELLPADDING="0"
-CELLSPACING="0"
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
-><A
-HREF="Bv9ARM.ch01.html"
-ACCESSKEY="P"
->Prev</A
-></TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-><A
-HREF="Bv9ARM.html"
-ACCESSKEY="H"
->Home</A
-></TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
-><A
-HREF="Bv9ARM.ch03.html"
-ACCESSKEY="N"
->Next</A
-></TD
-></TR
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
->Introduction</TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
->&nbsp;</TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
->Nameserver Configuration</TD
-></TR
-></TABLE
-></DIV
-></BODY
-></HTML
-> \ No newline at end of file