Mercurial > hg > nginx-site
annotate xml/ru/docs/http/ngx_http_memcached_module.xml @ 666:7465218cf964
Added pop3,imap and smtp mail modules to modules index.
author | Vladimir Homutov <vl@nginx.com> |
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date | Wed, 05 Sep 2012 15:25:26 +0000 |
parents | 764fbac1b8b4 |
children | 08140f6b7964 |
rev | line source |
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222
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1 <?xml version="1.0"?> |
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2 |
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Added copyright markers to documentation sources.
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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 |
361 | 10 <module name="Модуль ngx_http_memcached_module" |
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11 link="/ru/docs/http/ngx_http_memcached_module.html" |
589 | 12 lang="ru" |
13 rev="1"> | |
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14 |
110
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15 <section id="summary"> |
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16 |
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17 <para> |
361 | 18 Модуль <literal>ngx_http_memcached_module</literal> позволяет получать |
19 ответ из сервера memcached. | |
20 Ключ задаётся в переменной <var>$memcached_key</var>. | |
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21 Ответ в memcached должен быть предварительно помещён внешним по отношению |
361 | 22 к nginx’у способом. |
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23 </para> |
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24 |
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25 </section> |
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26 |
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27 |
361 | 28 <section id="example" name="Пример конфигурации"> |
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29 |
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30 <para> |
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31 <example> |
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32 server { |
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33 location / { |
361 | 34 set $memcached_key "$uri?$args"; |
35 memcached_pass host:11211; | |
36 error_page 404 502 504 = @fallback; | |
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37 } |
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38 |
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39 location @fallback { |
361 | 40 proxy_pass http://backend; |
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41 } |
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42 } |
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43 </example> |
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44 </para> |
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45 |
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46 </section> |
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47 |
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48 |
361 | 49 <section id="directives" name="Директивы"> |
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50 |
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51 <directive name="memcached_buffer_size"> |
102
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52 <syntax><value>размер</value></syntax> |
361 | 53 <default>4k|8k</default> |
54 <context>http</context> | |
55 <context>server</context> | |
56 <context>location</context> | |
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57 |
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58 <para> |
361 | 59 Задаёт <value>размер</value> буфера, в который будет читаться ответ, |
285 | 60 получаемый от сервера memcached. |
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61 Ответ синхронно передаётся клиенту сразу же по мере его поступления. |
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62 </para> |
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63 |
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64 </directive> |
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65 |
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66 |
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67 <directive name="memcached_connect_timeout"> |
102
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68 <syntax><value>время</value></syntax> |
361 | 69 <default>60s</default> |
70 <context>http</context> | |
71 <context>server</context> | |
72 <context>location</context> | |
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73 |
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74 <para> |
361 | 75 Задаёт таймаут для установления соединения с сервером memcached. |
76 Необходимо иметь в виду, что этот таймаут обычно не может превышать 75 секунд. | |
76
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77 </para> |
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78 |
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79 </directive> |
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80 |
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81 |
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82 <directive name="memcached_next_upstream"> |
271 | 83 <syntax> |
364 | 84 <literal>error</literal> | |
85 <literal>timeout</literal> | | |
86 <literal>invalid_response</literal> | | |
87 <literal>not_found</literal> | | |
88 <literal>off</literal> | |
89 ...</syntax> | |
102
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90 <default>error timeout</default> |
361 | 91 <context>http</context> |
92 <context>server</context> | |
93 <context>location</context> | |
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94 |
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95 <para> |
361 | 96 Определяет, в каких случаях запрос будет передан следующему серверу: |
97 <list type="tag"> | |
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98 |
361 | 99 <tag-name><literal>error</literal></tag-name> |
100 <tag-desc>произошла ошибка соединения с сервером, передачи ему запроса или | |
101 чтения заголовка ответа сервера;</tag-desc> | |
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102 |
361 | 103 <tag-name><literal>timeout</literal></tag-name> |
104 <tag-desc>произошёл таймаут во время соединения с сервером, | |
105 передачи ему запроса или чтения заголовка ответа сервера;</tag-desc> | |
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106 |
361 | 107 <tag-name><literal>invalid_response</literal></tag-name> |
108 <tag-desc>сервер вернул пустой или неверный ответ;</tag-desc> | |
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109 |
361 | 110 <tag-name><literal>not_found</literal></tag-name> |
111 <tag-desc>сервер не нашёл ответ;</tag-desc> | |
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112 |
361 | 113 <tag-name><literal>off</literal></tag-name> |
114 <tag-desc>запрещает передачу запроса следующему серверу.</tag-desc> | |
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115 |
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116 </list> |
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117 </para> |
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118 |
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119 <para> |
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120 Необходимо понимать, что передача запроса следующему серверу возможна |
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121 только при условии, что клиенту ещё ничего не передавалось. |
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122 То есть, если ошибка или таймаут возникли в середине передачи ответа, |
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123 то исправить это уже невозможно. |
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124 </para> |
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125 |
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126 </directive> |
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127 |
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128 |
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129 <directive name="memcached_pass"> |
361 | 130 <syntax><value>адрес</value></syntax> |
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131 <default/> |
361 | 132 <context>location</context> |
133 <context>if в location</context> | |
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134 |
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135 <para> |
361 | 136 Задаёт адрес сервера memcached. |
137 Адрес может быть указан в виде доменного имени или адреса, и порта, например, | |
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138 <example> |
361 | 139 memcached_pass localhost:11211; |
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140 </example> |
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141 </para> |
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142 |
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143 <para> |
361 | 144 Если доменному имени соответствует несколько адресов, то все они будут |
145 использоваться по очереди (round-robin). | |
146 И, кроме того, адрес может быть | |
135
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147 <link doc="ngx_http_upstream_module.xml">группой серверов</link>. |
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148 </para> |
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149 |
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150 </directive> |
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151 |
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152 |
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153 <directive name="memcached_read_timeout"> |
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154 <syntax><value>время</value></syntax> |
361 | 155 <default>60s</default> |
156 <context>http</context> | |
157 <context>server</context> | |
158 <context>location</context> | |
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159 |
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160 <para> |
361 | 161 Задаёт таймаут при чтении ответа сервера memcached. |
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162 Таймаут устанавливается не на всю передачу ответа, |
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163 а только между двумя операциями чтения. |
361 | 164 Если по истечении этого времени сервер memcached ничего не передаст, |
165 соединение закрывается. | |
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166 </para> |
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167 |
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168 </directive> |
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169 |
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170 |
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171 <directive name="memcached_send_timeout"> |
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172 <syntax><value>время</value></syntax> |
361 | 173 <default>60s</default> |
174 <context>http</context> | |
175 <context>server</context> | |
176 <context>location</context> | |
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177 |
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178 <para> |
361 | 179 Задаёт таймаут при передаче запроса серверу memcached. |
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180 Таймаут устанавливается не на всю передачу запроса, |
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181 а только между двумя операциями записи. |
361 | 182 Если по истечении этого времени сервер memcached не примет новых данных, |
183 соединение закрывается. | |
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184 </para> |
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185 |
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186 </directive> |
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187 |
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188 </section> |
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189 |
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190 </module> |