Mercurial > hg > nginx-site
annotate xml/ru/docs/stream/ngx_stream_log_module.xml @ 1947:6b6d0e844bf7
Moved "health_check" and "match" to ngx_stream_upstream_hc_module.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Fri, 24 Mar 2017 19:48:53 +0300 |
parents | 0b339643b08f |
children | dab82d534f0f |
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222
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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) Nginx, Inc. |
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5 --> |
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6 |
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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8 |
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9 <module name="Модуль ngx_stream_log_module" |
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10 link="/ru/docs/stream/ngx_stream_log_module.html" |
589 | 11 lang="ru" |
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12 rev="5"> |
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13 |
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14 <section id="summary"> |
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15 |
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16 <para> |
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17 Модуль <literal>ngx_stream_log_module</literal> (1.11.4) записывает логи сессий |
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18 в указанном формате. |
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19 </para> |
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20 |
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21 </section> |
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22 |
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23 |
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24 <section id="example" name="Пример конфигурации"> |
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25 |
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26 <para> |
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27 <example> |
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28 log_format basic '$remote_addr [$time_local] ' |
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29 '$protocol $status $bytes_sent $bytes_received ' |
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30 '$session_time'; |
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31 |
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32 access_log /spool/logs/nginx-access.log basic buffer=32k; |
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33 </example> |
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34 </para> |
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35 |
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36 </section> |
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37 |
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38 |
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39 <section id="directives" name="Директивы"> |
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40 |
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41 <directive name="access_log"> |
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42 <syntax> |
364 | 43 <value>путь</value> |
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44 <value>формат</value> |
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45 [<literal>buffer</literal>=<value>размер</value>] |
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46 [<literal>gzip[=<value>степень</value>]</literal>] |
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47 [<literal>flush</literal>=<value>время</value>] |
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48 [<literal>if</literal>=<value>условие</value>]</syntax> |
271 | 49 <syntax><literal>off</literal></syntax> |
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50 <default>off</default> |
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51 <context>stream</context> |
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52 <context>server</context> |
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53 |
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54 <para> |
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55 Задаёт путь, <link id="log_format">формат</link> |
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56 и настройки буферизованной записи в лог. |
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57 На одном уровне может использоваться несколько логов. |
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58 Запись в <link doc="../syslog.xml">syslog</link> |
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59 настраивается указанием префикса |
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60 “<literal>syslog:</literal>” в первом параметре. |
271 | 61 Специальное значение <literal>off</literal> отменяет все директивы |
62 <literal>access_log</literal> для текущего уровня. | |
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63 </para> |
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64 |
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65 <para> |
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66 Если задан размер буфера с помощью параметра <literal>buffer</literal> или |
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67 указан параметр <literal>gzip</literal>, то запись будет |
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68 буферизованной. |
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69 <note> |
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70 Размер буфера должен быть не больше размера атомарной записи в дисковый файл. |
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71 Для FreeBSD этот размер неограничен. |
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72 </note> |
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73 </para> |
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74 |
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75 <para> |
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76 При включённой буферизации данные записываются в файл: |
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77 <list type="bullet"> |
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78 |
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79 <listitem> |
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80 если очередная строка лога не помещается в буфер; |
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81 </listitem> |
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82 |
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83 <listitem> |
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84 если данные в буфере находятся дольше интервала времени, заданного |
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85 параметром <literal>flush</literal>; |
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86 </listitem> |
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87 |
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88 <listitem> |
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89 при <link doc="../control.xml">переоткрытии</link> лог-файла или |
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90 завершении рабочего процесса. |
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91 </listitem> |
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92 |
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93 </list> |
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94 </para> |
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95 |
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96 <para> |
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97 Если задан параметр <literal>gzip</literal>, то буфер будет сжиматься перед |
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98 записью в файл. |
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99 Степень сжатия может быть задана в диапазоне от 1 (быстрее, но хуже сжатие) |
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100 до 9 (медленнее, но лучше сжатие). |
966 | 101 По умолчанию используются буфер размером 64К байт и степень сжатия 1. |
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102 Данные сжимаются атомарными блоками, и в любой момент времени лог-файл может |
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103 быть распакован или прочитан с помощью утилиты “<literal>zcat</literal>”. |
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104 </para> |
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105 |
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106 <para> |
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107 Пример: |
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108 <example> |
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109 access_log /path/to/log.gz basic gzip flush=5m; |
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110 </example> |
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111 </para> |
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112 |
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113 <para> |
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114 <note> |
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115 Для поддержки gzip-сжатия логов nginx должен быть собран с библиотекой zlib. |
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116 </note> |
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117 </para> |
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118 |
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119 <para> |
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120 В пути файла можно использовать переменные, |
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121 но такие логи имеют некоторые ограничения: |
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122 <list type="bullet"> |
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123 |
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124 <listitem> |
224
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125 <link doc="../ngx_core_module.xml" id="user">пользователь</link>, |
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126 с правами которого работают рабочие процессы, должен |
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127 иметь права на создание файлов в каталоге с такими логами; |
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128 </listitem> |
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129 |
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130 <listitem> |
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131 не работает буферизация; |
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132 </listitem> |
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133 |
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134 <listitem> |
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135 файл открывается для каждой записи в лог и сразу же после записи закрывается. |
224
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136 Следует однако иметь в виду, что поскольку дескрипторы часто используемых файлов |
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137 могут храниться в <link id="open_log_file_cache">кэше</link>, |
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138 то при вращении логов в течение времени, заданного параметром |
271 | 139 <literal>valid</literal> директивы <link id="open_log_file_cache"/>, |
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140 запись может продолжаться в старый файл. |
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141 </listitem> |
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142 |
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143 </list> |
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144 </para> |
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145 |
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146 <para> |
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147 Параметр <literal>if</literal> включает условную запись в лог. |
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148 Сессия не будет записываться в лог, если результатом вычисления |
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149 <value>условия</value> является “0” или пустая строка. |
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150 </para> |
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151 |
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152 </directive> |
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153 |
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154 |
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155 <directive name="log_format"> |
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156 <syntax> |
271 | 157 <value>название</value> |
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158 [<literal>escape</literal>=<literal>default</literal>|<literal>json</literal>] |
271 | 159 <value>строка</value> ...</syntax> |
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160 <default></default> |
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161 <context>stream</context> |
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162 |
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163 <para> |
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164 Задаёт формат лога, например: |
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165 <example> |
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166 log_format proxy '$remote_addr [$time_local] ' |
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167 '$protocol $status $bytes_sent $bytes_received ' |
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168 '$session_time "$upstream_addr" ' |
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169 '"$upstream_bytes_sent" "$upstream_bytes_received" "$upstream_connect_time"'; |
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170 </example> |
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171 </para> |
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172 |
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173 <para id="log_format_escape"> |
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174 Параметр <literal>escape</literal> (1.11.8) позволяет задать |
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175 экранирование символов <literal>json</literal> или <literal>default</literal> |
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176 в переменных, по умолчанию используется <literal>default</literal>. |
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177 </para> |
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178 |
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179 </directive> |
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180 |
364 | 181 |
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182 <directive name="open_log_file_cache"> |
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183 |
224
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184 <syntax> |
271 | 185 <literal>max</literal>=<value>N</value> |
186 [<literal>inactive</literal>=<value>время</value>] | |
187 [<literal>min_uses</literal>=<value>N</value>] | |
188 [<literal>valid</literal>=<value>время</value>]</syntax> | |
189 <syntax><literal>off</literal></syntax> | |
102
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190 <default>off</default> |
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191 <context>stream</context> |
224
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192 <context>server</context> |
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193 |
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194 <para> |
224
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195 Задаёт кэш, в котором хранятся дескрипторы файлов часто используемых |
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196 логов, имена которых заданы с использованием переменных. |
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197 Параметры директивы: |
224
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198 <list type="tag"> |
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199 |
271 | 200 <tag-name><literal>max</literal></tag-name> |
224
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201 <tag-desc> |
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202 задаёт максимальное число дескрипторов в кэше; |
507 | 203 при переполнении кэша наименее востребованные (LRU) |
224
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204 дескрипторы закрываются |
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205 </tag-desc> |
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206 |
271 | 207 <tag-name><literal>inactive</literal></tag-name> |
224
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208 <tag-desc> |
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209 задаёт время, после которого закэшированный дескриптор закрывается, |
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210 если к нему не было обращений в течение этого времени; |
224
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211 по умолчанию 10 секунд |
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212 </tag-desc> |
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213 |
271 | 214 <tag-name><literal>min_uses</literal></tag-name> |
224
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215 <tag-desc> |
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216 задаёт минимальное число использований файла в течение |
271 | 217 времени, заданного параметром <literal>inactive</literal>, |
224
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218 после которого дескриптор файла будет оставаться открытым в кэше; |
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219 по умолчанию 1 |
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220 </tag-desc> |
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221 |
271 | 222 <tag-name><literal>valid</literal></tag-name> |
224
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223 <tag-desc> |
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224 задаёт, через какое время нужно проверять, что файл ещё |
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225 существует под тем же именем; |
224
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226 по умолчанию 60 секунд |
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227 </tag-desc> |
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228 |
271 | 229 <tag-name><literal>off</literal></tag-name> |
224
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230 <tag-desc> |
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231 запрещает кэш |
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232 </tag-desc> |
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233 |
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234 </list> |
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235 </para> |
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236 |
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237 <para> |
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238 Пример использования: |
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239 <example> |
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240 open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2; |
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241 </example> |
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242 </para> |
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243 |
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244 </directive> |
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245 |
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Maxim Dounin <mdounin@mdounin.ru>
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246 </section> |
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247 |
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248 </module> |