Mercurial > hg > nginx-site

annotate xml/ru/docs/http/ngx_http_memcached_module.xml @ 76:4a4caa566120

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Russian documentation import. Changes in module.dtd: <example> now allowed to contain <value> and <emphasis> elements (we need this to show important parts in examples), less strict checking of <directive> syntax (we don't want to fully document some directives, notably deprecated ones). Known issues: 1. <syntax> elements are preserved as is, they will require manual conversion (likely to some not-yet-existed format a la DocBook cmdsynopsis, as currently used one seems to be incomplete); 2. <value> no longer corresponds to replaceable content, and it's use in examples isn't correct; 3. <link doc="document#fragment"> doesn't work with current xslt, either should be supported or changed to <link doc="document" id="fragment">. The following files are intentionally omitted: maillists.xml (support.xml should be used instead), experimental.xml (obsolete), faq.xml (conflicts with existing one, needs discussion). Not yet linked to site.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 11 Oct 2011 12:57:50 +0000
parents
children 1d315ef37215
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
76
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1 <?xml version="1.0" encoding="utf-8"?>
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2
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3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Директивы модуля ngx_http_memcached_module"
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6 link="/ru/docs/http/ngx_http_memcached_module.html"
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7 lang="ru">
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8
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9 <section name="" id="summary">
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10
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11 <para>
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12 Модуль ngx_http_memcached_module позволяет получать ответ из сервера memcached.
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13 Ключ задаётся в переменной $memcached_key.
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14 Ответ в memcached должен быть предварительно помещён внешним по отношению
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15 к nginx'у способом.
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16 </para>
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17
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18 </section>
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19
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20
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21 <section name="Пример конфигурации" id="example">
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22
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23 <para>
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24 <example>
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25 server {
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26 location / {
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27 set $memcached_key "$uri?$args";
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28 memcached_pass host:11211;
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29 error_page 404 502 504 = @fallback;
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30 }
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31
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32 location @fallback {
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33 proxy_pass http://backend;
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34 }
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35 }
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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 name="Директивы" id="directives">
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43
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44 <directive name="memcached_buffer_size">
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45 <syntax>memcached_buffer_size <value>размер</value></syntax>
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46 <default>memcached_buffer_size 4k/8k</default>
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47 <context>http, server, location</context>
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48
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49 <para>
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50 Директива задаёт размер буфера, в который будет читаться ответ,
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51 получаемый от cервера memcached.
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52 Ответ синхронно передаётся клиенту сразу же по мере его поступления.
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53 </para>
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54
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55 </directive>
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56
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57
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58 <directive name="memcached_connect_timeout">
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59 <syntax>memcached_connect_timeout <value>время</value></syntax>
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60 <default>memcached_connect_timeout 60</default>
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61 <context>http, server, location</context>
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62
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63 <para>
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64 Директива задаёт таймаут для соединения с cервером memcached.
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65 Необходимо иметь в виду, что этот таймаут не может быть больше 75 секунд.
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66 </para>
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67
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68 </directive>
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69
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70
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71 <directive name="memcached_next_upstream">
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72 <syntax>memcached_next_upstream
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73 <value>[error|timeout|invalid_response|not_found|off]</value>
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74 </syntax>
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75 <default>memcached_next_upstream error timeout</default>
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76 <context>http, server, location</context>
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77
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78 <para>
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79 Директива определяет, в каких случаях запрос будет передан следующему
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80 серверу memcached:
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81 <list type="bullet">
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82
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83 <listitem>
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84 error — произшла ошибка соединения с сервером, передачи ему запроса или
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85 чтения заголовка ответа сервера;
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86 </listitem>
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87
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88 <listitem>
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89 timeout — произошёл таймаут во время соединения с сервером,
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90 передачи ему запроса или чтения заголовка ответа сервера;
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91 </listitem>
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92
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93 <listitem>
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94 invalid_response — сервер вернул пустой или неверный ответ;
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95 </listitem>
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96
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97 <listitem>
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98 not_found — сервер не нашёл ответ;
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99 </listitem>
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100
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101 <listitem>
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102 off — запрещает передачу запроса следующему серверу;
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103 </listitem>
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104
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105 </list>
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106 </para>
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107
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108 <para>
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109 Необходимо понимать, что передача запроса следующему серверу возможна
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110 только при условии, что клиенту ещё ничего не передавалось.
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111 То есть, если ошибка или таймаут возникли в середине передачи ответа,
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112 то исправить это уже невозможно.
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113 </para>
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114
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115 </directive>
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116
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117
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118 <directive name="memcached_pass">
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119 <syntax>memcached_pass <value>URL</value></syntax>
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120 <default>нет</default>
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121 <context>location, if в location, limit_except</context>
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122
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123 <para>
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124 Директива задаёт адрес сервера memcached.
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125 Адрес может быть указан в виде доменного имени или адреса и порта:
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126 <example>
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127 memcached_pass localhost:11211;
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128 </example>
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129 </para>
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130
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131 <para>
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132 Если доменное имя резолвится в несколько адресов, то все они будут
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133 использоваться в режиме round-robin.
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134 И кроме того, адрес может быть
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135 <link doc="ngx_http_upstream.xml">группой серверов</link>.
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136 </para>
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137
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138 </directive>
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139
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140
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141 <directive name="memcached_read_timeout">
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142 <syntax>memcached_read_timeout <value>время</value></syntax>
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143 <default>memcached_read_timeout 60</default>
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144 <context>http, server, location</context>
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145
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146 <para>
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147 Директива задаёт таймаут при чтении ответа сервера memcached.
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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148 Таймаут устанавливается не на всю передачу ответа,
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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149 а только между двумя операциями чтения.
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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150 Если по истечении этого времени сервер ничего не передаст,
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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151 то nginx закрывает соединение.
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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152 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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153
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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154 </directive>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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155
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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156
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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157 <directive name="memcached_send_timeout">
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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158 <syntax>memcached_send_timeout <value>время</value></syntax>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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159 <default>memcached_send_timeout 60</default>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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160 <context>http, server, location</context>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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161
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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162 <para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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163 Директива задаёт таймаут при передаче запроса серверу memcached.
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
164 Таймаут устанавливается не на всю передачу запроса,
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
165 а только между двумя операциями записи.
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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166 Если по истечении этого времени сервер не примет новых данных,
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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167 то nginx закрывает соединение.
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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168 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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169
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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170 </directive>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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171
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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172 </section>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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173
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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174 </module>