/contrib/bind9/doc/arm/Bv9ARM.ch02.html

https://bitbucket.org/freebsd/freebsd-head/ · HTML · 158 lines · 141 code · 0 blank · 17 comment · 0 complexity · 248fd7c4b95a7387fecb273ca32869d5 MD5 · raw file 

    

  1. <!--
    2. 

  2.  - Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
    3. 

  3.  - Copyright (C) 2000-2003 Internet Software Consortium.
    4. 

  4.  - 
    5. 

  5.  - Permission to use, copy, modify, and/or distribute this software for any
    6. 

  6.  - purpose with or without fee is hereby granted, provided that the above
    7. 

  7.  - copyright notice and this permission notice appear in all copies.
    8. 

  8.  - 
    9. 

  9.  - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
    10. 

  10.  - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    11. 

  11.  - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
    12. 

  12.  - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    13. 

  13.  - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
    14. 

  14.  - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    15. 

  15.  - PERFORMANCE OF THIS SOFTWARE.
    16. 

  16. -->
    17. 

  17. <!-- $Id$ -->
    18. 

  18. <html>
    19. 

  19. <head>
    20. 

  20. <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    21. 

  21. <title>Chapter 2. BIND Resource Requirements</title>
    22. 

  22. <meta name="generator" content="DocBook XSL Stylesheets V1.71.1">
    23. 

  23. <link rel="start" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
    24. 

  24. <link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
    25. 

  25. <link rel="prev" href="Bv9ARM.ch01.html" title="Chapter 1. Introduction">
    26. 

  26. <link rel="next" href="Bv9ARM.ch03.html" title="Chapter 3. Name Server Configuration">
    27. 

  27. </head>
    28. 

  28. <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
    29. 

  29. <div class="navheader">
    30. 

  30. <table width="100%" summary="Navigation header">
    31. 

  31. <tr><th colspan="3" align="center">Chapter 2. <acronym class="acronym">BIND</acronym> Resource Requirements</th></tr>
    32. 

  32. <tr>
    33. 

  33. <td width="20%" align="left">
    34. 

  34. <a accesskey="p" href="Bv9ARM.ch01.html">Prev</a> </td>
    35. 

  35. <th width="60%" align="center"> </th>
    36. 

  36. <td width="20%" align="right"> <a accesskey="n" href="Bv9ARM.ch03.html">Next</a>
    37. 

  37. </td>
    38. 

  38. </tr>
    39. 

  39. </table>
    40. 

  40. <hr>
    41. 

  41. </div>
    42. 

  42. <div class="chapter" lang="en">
    43. 

  43. <div class="titlepage"><div><div><h2 class="title">
    44. 

  44. <a name="Bv9ARM.ch02"></a>Chapter 2. <acronym class="acronym">BIND</acronym> Resource Requirements</h2></div></div></div>
    45. 

  45. <div class="toc">
    46. 

  46. <p><b>Table of Contents</b></p>
    47. 

  47. <dl>
    48. 

  48. <dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567594">Hardware requirements</a></span></dt>
    49. 

  49. <dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567621">CPU Requirements</a></span></dt>
    50. 

  50. <dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567634">Memory Requirements</a></span></dt>
    51. 

  51. <dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567729">Name Server Intensive Environment Issues</a></span></dt>
    52. 

  52. <dt><span class="sect1"><a href="Bv9ARM.ch02.html#id2567739">Supported Operating Systems</a></span></dt>
    53. 

  53. </dl>
    54. 

  54. </div>
    55. 

  55. <div class="sect1" lang="en">
    56. 

  56. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
    57. 

  57. <a name="id2567594"></a>Hardware requirements</h2></div></div></div>
    58. 

  58. <p>
    59. 

  59.         <acronym class="acronym">DNS</acronym> hardware requirements have
    60. 

  60.         traditionally been quite modest.
    61. 

  61.         For many installations, servers that have been pensioned off from
    62. 

  62.         active duty have performed admirably as <acronym class="acronym">DNS</acronym> servers.
    63. 

  63.       </p>
    64. 

  64. <p>
    65. 

  65.         The DNSSEC features of <acronym class="acronym">BIND</acronym> 9
    66. 

  66.         may prove to be quite
    67. 

  67.         CPU intensive however, so organizations that make heavy use of these
    68. 

  68.         features may wish to consider larger systems for these applications.
    69. 

  69.         <acronym class="acronym">BIND</acronym> 9 is fully multithreaded, allowing
    70. 

  70.         full utilization of
    71. 

  71.         multiprocessor systems for installations that need it.
    72. 

  72.       </p>
    73. 

  73. </div>
    74. 

  74. <div class="sect1" lang="en">
    75. 

  75. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
    76. 

  76. <a name="id2567621"></a>CPU Requirements</h2></div></div></div>
    77. 

  77. <p>
    78. 

  78.         CPU requirements for <acronym class="acronym">BIND</acronym> 9 range from
    79. 

  79.         i486-class machines
    80. 

  80.         for serving of static zones without caching, to enterprise-class
    81. 

  81.         machines if you intend to process many dynamic updates and DNSSEC
    82. 

  82.         signed zones, serving many thousands of queries per second.
    83. 

  83.       </p>
    84. 

  84. </div>
    85. 

  85. <div class="sect1" lang="en">
    86. 

  86. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
    87. 

  87. <a name="id2567634"></a>Memory Requirements</h2></div></div></div>
    88. 

  88. <p>
    89. 

  89.         The memory of the server has to be large enough to fit the
    90. 

  90.         cache and zones loaded off disk.  The <span><strong class="command">max-cache-size</strong></span>
    91. 

  91.         option can be used to limit the amount of memory used by the cache,
    92. 

  92.         at the expense of reducing cache hit rates and causing more <acronym class="acronym">DNS</acronym>
    93. 

  93.         traffic.
    94. 

  94.         Additionally, if additional section caching
    95. 

  95.         (<a href="Bv9ARM.ch06.html#acache" title="Additional Section Caching">the section called &#8220;Additional Section Caching&#8221;</a>) is enabled,
    96. 

  96.         the <span><strong class="command">max-acache-size</strong></span> option can be used to
    97. 

  97.         limit the amount
    98. 

  98.         of memory used by the mechanism.
    99. 

  99.         It is still good practice to have enough memory to load
    100. 

  100.         all zone and cache data into memory &#8212; unfortunately, the best
    101. 

  101.         way
    102. 

  102.         to determine this for a given installation is to watch the name server
    103. 

  103.         in operation. After a few weeks the server process should reach
    104. 

  104.         a relatively stable size where entries are expiring from the cache as
    105. 

  105.         fast as they are being inserted.
    106. 

  106.       </p>
    107. 

  107. </div>
    108. 

  108. <div class="sect1" lang="en">
    109. 

  109. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
    110. 

  110. <a name="id2567729"></a>Name Server Intensive Environment Issues</h2></div></div></div>
    111. 

  111. <p>
    112. 

  112.         For name server intensive environments, there are two alternative
    113. 

  113.         configurations that may be used. The first is where clients and
    114. 

  114.         any second-level internal name servers query a main name server, which
    115. 

  115.         has enough memory to build a large cache. This approach minimizes
    116. 

  116.         the bandwidth used by external name lookups. The second alternative
    117. 

  117.         is to set up second-level internal name servers to make queries
    118. 

  118.         independently.
    119. 

  119.         In this configuration, none of the individual machines needs to
    120. 

  120.         have as much memory or CPU power as in the first alternative, but
    121. 

  121.         this has the disadvantage of making many more external queries,
    122. 

  122.         as none of the name servers share their cached data.
    123. 

  123.       </p>
    124. 

  124. </div>
    125. 

  125. <div class="sect1" lang="en">
    126. 

  126. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
    127. 

  127. <a name="id2567739"></a>Supported Operating Systems</h2></div></div></div>
    128. 

  128. <p>
    129. 

  129.         ISC <acronym class="acronym">BIND</acronym> 9 compiles and runs on a large
    130. 

  130.         number
    131. 

  131.         of Unix-like operating systems and on 
    132. 

  132.         Microsoft Windows Server 2003 and 2008, and Windows XP and Vista.
    133. 

  133.         For an up-to-date
    134. 

  134.         list of supported systems, see the README file in the top level
    135. 

  135.         directory
    136. 

  136.         of the BIND 9 source distribution.
    137. 

  137.       </p>
    138. 

  138. </div>
    139. 

  139. </div>
    140. 

  140. <div class="navfooter">
    141. 

  141. <hr>
    142. 

  142. <table width="100%" summary="Navigation footer">
    143. 

  143. <tr>
    144. 

  144. <td width="40%" align="left">
    145. 

  145. <a accesskey="p" href="Bv9ARM.ch01.html">Prev</a> </td>
    146. 

  146. <td width="20%" align="center"> </td>
    147. 

  147. <td width="40%" align="right"> <a accesskey="n" href="Bv9ARM.ch03.html">Next</a>
    148. 

  148. </td>
    149. 

  149. </tr>
    150. 

  150. <tr>
    151. 

  151. <td width="40%" align="left" valign="top">Chapter 1. Introduction </td>
    152. 

  152. <td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
    153. 

  153. <td width="40%" align="right" valign="top"> Chapter 3. Name Server Configuration</td>
    154. 

  154. </tr>
    155. 

  155. </table>
    156. 

  156. </div>
    157. 

  157. </body>
    158. 

  158. </html>
    159.