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annotate xml/ru/docs/stream/ngx_stream_map_module.xml @ 2769:16f6fa718be2

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Updated TLSv1.3 support notes. Previous notes described some early development snapshot of OpenSSL 1.1.1 with disabled TLSv1.3 by default. It was then enabled in the first alpha. Further, the updated text covers later major releases such as OpenSSL 3.0.
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 30 Sep 2021 16:29:20 +0300
parents c6b5826b64f7
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Igor Sysoev
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5 Copyright (C) Nginx, Inc.
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6 -->
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7
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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9
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10 <module name="Модуль ngx_stream_map_module"
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11 link="/ru/docs/stream/ngx_stream_map_module.html"
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12 lang="ru"
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13 rev="2">
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14
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15 <section id="summary">
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16
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17 <para>
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18 Модуль <literal>ngx_stream_map_module</literal> (1.11.2) создаёт переменные,
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19 значения которых зависят от значений других переменных.
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20 </para>
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21
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22 </section>
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23
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24
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25 <section id="example" name="Пример конфигурации">
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26
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27 <para>
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28 <example>
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29 map $remote_addr $limit {
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30 127.0.0.1 "";
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31 default $binary_remote_addr;
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32 }
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33
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34 limit_conn_zone $limit zone=addr:10m;
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35 limit_conn addr 1;
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36 </example>
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37 </para>
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38
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39 </section>
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40
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41
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42 <section id="directives" name="Директивы">
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43
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44 <directive name="map">
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45 <syntax block="yes">
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46 <value>строка</value>
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47 <value>$переменная</value></syntax>
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48 <default/>
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49 <context>stream</context>
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50
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51 <para>
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52 Создаёт новую переменную, значение которой
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53 зависит от значений одной или более исходных переменных,
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54 указанных в первом параметре.
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55 </para>
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56
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57 <para>
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58 <note>
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59 Поскольку переменные вычисляются только в момент использования,
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60 само по себе наличие даже большого числа объявлений переменных
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61 “<literal>map</literal>” не влечёт за собой никаких дополнительных
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62 расходов на обработку соединений.
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63 </note>
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64 </para>
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65
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66 <para>
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67 Параметры внутри блока <literal>map</literal> задают соответствие
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68 между исходными и результирующими значениями.
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69 </para>
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70
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71 <para>
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72 Исходные значения задаются строками или регулярными выражениями.
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73 </para>
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74
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75 <para>
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76 Строки проверяются без учёта регистра.
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77 </para>
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78
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79 <para>
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80 Перед регулярным выражением ставится символ “<literal>~</literal>”,
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81 если при сравнении следует учитывать регистр символов, либо символы
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82 “<literal>~*</literal>”, если регистр символов учитывать не нужно.
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83 Регулярное выражение может содержать именованные и позиционные выделения,
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84 которые могут затем использоваться в других директивах совместно с
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85 результирующей переменной.
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86 </para>
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87
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88 <para>
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89 Если исходное значение совпадает с именем одного из специальных параметров,
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90 описанных ниже, перед ним следует поставить символ “<literal>\</literal>”.
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91 </para>
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92
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93 <para>
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94 В качестве результирующего значения можно указать текст,
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95 переменную и их комбинации.
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96 </para>
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97
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98 <para>
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99 Также поддерживаются следующие специальные параметры:
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100 <list type="tag">
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101 <tag-name><literal>default</literal> <value>значение</value></tag-name>
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102 <tag-desc>
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103 задаёт результирующее значение, если исходное значение не
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104 совпадает ни с одним из перечисленных.
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105 Если параметр <literal>default</literal> не указан, результирующим значением
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106 по умолчанию будет пустая строка.
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107 </tag-desc>
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108
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109 <tag-name><literal>hostnames</literal></tag-name>
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110 <tag-desc>
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111 указывает, что в качестве исходных значений можно
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112 использовать маску для первой или последней части имени хоста, например,
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113 <example>
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114 *.example.com 1;
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115 example.* 1;
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116 </example>
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117 Вместо двух записей
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118 <example>
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119 example.com 1;
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120 *.example.com 1;
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121 </example>
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122 можно использовать одну:
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123 <example>
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124 .example.com 1;
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125 </example>
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126 Этот параметр следует указывать перед списком значений.
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127 </tag-desc>
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128
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129 <tag-name><literal>include</literal> <value>файл</value></tag-name>
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130 <tag-desc>
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131 включает файл со значениями.
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132 Включений может быть несколько.
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133 </tag-desc>
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134
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135 <tag-name id="volatile"><literal>volatile</literal></tag-name>
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136 <tag-desc>
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137 указывает, что переменная не кэшируется (1.11.7).
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138 </tag-desc>
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139
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140 </list>
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141 </para>
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142
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143 <para>
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144 Если исходному значению соответствует несколько из указанных вариантов,
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145 например, одновременно подходят и маска, и регулярное выражение,
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146 будет выбран первый подходящий вариант в следующем порядке приоритета:
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147 <list type="enum">
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148
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149 <listitem>
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150 строковое значение без маски
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151 </listitem>
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152
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153 <listitem>
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154 самое длинное строковое значение с маской в начале,
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155 например “<literal>*.example.com</literal>”
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156 </listitem>
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157
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158 <listitem>
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159 самое длинное строковое значение с маской в конце,
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160 например “<literal>mail.*</literal>”
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161 </listitem>
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162
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163 <listitem>
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164 первое подходящее регулярное выражение
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165 (в порядке следования в конфигурационном файле)
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166 </listitem>
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167
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168 <listitem>
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169 значение по умолчанию (<literal>default</literal>)
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170 </listitem>
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171
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172 </list>
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173 </para>
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174
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175 </directive>
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176
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177
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178 <directive name="map_hash_bucket_size">
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179 <syntax><value>размер</value></syntax>
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180 <default>32|64|128</default>
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181 <context>stream</context>
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182
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183 <para>
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184 Задаёт размер корзины в хэш-таблицах для переменных <link id="map"/>.
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185 Значение по умолчанию зависит от размера строки кэша процессора.
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186 Подробнее настройка хэш-таблиц обсуждается в отдельном
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187 <link doc="../hash.xml">документе</link>.
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188 </para>
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189
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190 </directive>
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191
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192
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193 <directive name="map_hash_max_size">
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194 <syntax><value>размер</value></syntax>
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195 <default>2048</default>
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196 <context>stream</context>
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197
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198 <para>
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199 Задаёт максимальный размер хэш-таблиц для переменных <link id="map"/>.
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200 Подробнее настройка хэш-таблиц обсуждается в отдельном
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201 <link doc="../hash.xml">документе</link>.
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202 </para>
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203
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204 </directive>
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205
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206 </section>
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207
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208 </module>