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annotate xml/en/docs/http/ngx_http_split_clients_module.xml @ 353:7b6155ac373b

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Revised the Russian version of ngx_http_headers_module and translated it into English.
author Ruslan Ermilov <ru@nginx.com>
date Wed, 25 Jan 2012 13:22:09 +0000
parents 5a848934a12d
children bb51d3e17dd0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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348
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1 <?xml version="1.0"?>
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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="Module ngx_http_split_clients_module"
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6 link="/en/docs/http/ngx_http_split_clients_module.html"
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7 lang="en">
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8
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9 <section id="summary">
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10
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11 <para>
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12 The <literal>ngx_http_split_clients_module</literal> module creates
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13 variables suitable for A/B testing, also known as split testing.
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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 id="example" name="Example Configuration">
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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 split_clients "${remote_addr}AAA" $variant {
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25 0.5% .one;
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26 2.0% .two;
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27 * "";
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28 }
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29
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30 server {
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31 location / {
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32 index index${variant}.html;
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33 </example>
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34 </para>
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35 </section>
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36
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37
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38 <section id="directives" name="Directives">
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39
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40 <directive name="split_clients">
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41 <syntax block="yes">
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42 <value>string</value>
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43 <value>$variable</value></syntax>
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44 <default/>
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45 <context>http</context>
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46
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47 <para>
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48 Creates a variable for A/B testing, for example:
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49 <example>
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50 split_clients "${remote_addr}AAA" $variant {
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51 0.5% .one;
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52 2.0% .two;
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53 * "";
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54 }
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55 </example>
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56 The value of the original string is hashed using MurmurHash2.
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57 In the example given, hash values from 0 to 21474836 (0.5%)
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58 correspond to the <var>$variant</var> variable taking the
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59 value <literal>".one"</literal>,
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60 hash values from 21474837 to 107374182 (2%) correspond to
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61 the value <literal>".two"</literal>,
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62 and hash values from 107374183 to 4294967297 correspond to
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63 the value <literal>""</literal>.
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64 </para>
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65
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66 </directive>
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67
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68 </section>
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69
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70 </module>