Mercurial > hg > nginx-site

annotate xml/ru/docs/http/ngx_http_limit_zone_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
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children 1d315ef37215
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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_limit_zone_module"
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6 link="/ru/docs/http/ngx_http_limit_zone_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_limit_zone_module позволяет ограничить число одновременных
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13 соединений для заданной сессии или, как частный случай, с одного адреса.
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14 </para>
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15
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16 </section>
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17
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18
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19 <section name="Пример конфигурации" id="example">
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20
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21 <para>
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22 <example>
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23 http {
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24 limit_zone one $binary_remote_addr 10m;
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25
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26 ...
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27
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28 server {
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29
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30 ...
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31
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32 location /download/ {
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33 limit_conn one 1;
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34 }
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35 </example>
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36 </para>
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37
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38 </section>
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39
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40
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41 <section name="Директивы" id="directives">
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42
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43 <directive name="limit_zone">
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44 <syntax>limit_zone <value>название $переменная размер</value></syntax>
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45 <default>нет</default>
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46 <context>http</context>
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47
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48 <para>
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49 Директива описывает зону, в которой хранятся состояния сессий.
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50 Значения сессий определяется заданной переменной.
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51 Пример использования:
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52 <example>
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53 limit_zone one $binary_remote_addr 10m;
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54 </example>
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55 </para>
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56
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57 <para>
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58 В качестве сессии используется адрес клиента.
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59 Обратите внимание, что вместо переменной $remote_addr используется
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60 переменная $binary_remote_addr.
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61 Длина значений переменной $remote_addr может быть от 7 до 15 байт,
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62 поэтому размер состоянии равен 32 или 64 байтам.
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63 Длина всех значений переменной $binary_remote_addr всегда 4 байта
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64 и размер состояния всегда 32 байта.
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65 В зоне размером 1 мегабайт может разместиться около 32 000 состояний
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66 размером 32 байта.
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67 </para>
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68
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69 </directive>
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70
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71
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72 <directive name="limit_conn">
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73 <syntax>limit_conn <value>зона число</value></syntax>
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74 <default>нет</default>
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75 <context>http, server, location</context>
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76
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77 <para>
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78 Директива задаёт максимальное число одновременных соединений для одной сессии.
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79 При превышении этого числа запрос завершается кодом "Service unavailable" (503).
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80 Например, директивы
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81 <example>
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82 limit_zone one $binary_remote_addr 10m;
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83
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84 server {
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85 location /download/ {
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86 limit_conn one 1;
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87 }
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88
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89 </example>
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90 позволяют не более одного одновременного соединения с одного адреса.
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91 </para>
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92
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93 </directive>
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94
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95
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96 <directive name="limit_conn_log_level">
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97 <syntax>limit_conn_log_level <value>[info|notice|warn|error]</value></syntax>
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98 <default>limit_conn_log_level error</default>
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99 <context>http, server, location</context>
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100
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101 <para>
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102 Директива (0.8.18) задаёт уровень логирования случаев ограничения
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103 числа соединений.
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104 </para>
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105
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106 </directive>
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107
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108 </section>
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109
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110 </module>