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annotate xml/en/docs/stream/ngx_stream_split_clients_module.xml @ 1752:b4de612feff8

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Documented the split_clients module in stream.
author Yaroslav Zhuravlev <yar@nginx.com>
date Thu, 14 Jul 2016 20:33:18 +0300
parents xml/en/docs/http/ngx_http_split_clients_module.xml@95c3c3bbf1ce
children 42d2806f5b28
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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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9 <module name="Module ngx_stream_split_clients_module"
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10 link="/en/docs/stream/ngx_stream_split_clients_module.html"
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11 lang="en"
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12 rev="1">
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14 <section id="summary">
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15
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16 <para>
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17 The <literal>ngx_stream_split_clients_module</literal> module (1.11.3) creates
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18 variables suitable for A/B testing, also known as split testing.
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19 </para>
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20
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21 </section>
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24 <section id="example" name="Example Configuration">
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25
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26 <para>
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27 <example>
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28 stream {
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29 split_clients "${remote_addr}AAA" $variant {
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30 0.5% .one;
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31 2.0% .two;
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32 * "";
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33 }
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34 </example>
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35 </para>
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36
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37 </section>
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40 <section id="directives" name="Directives">
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41
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42 <directive name="split_clients">
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43 <syntax block="yes">
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44 <value>string</value>
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45 <value>$variable</value></syntax>
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46 <default/>
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47 <context>stream</context>
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49 <para>
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50 Creates a variable for A/B testing, for example:
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51 <example>
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52 split_clients "${remote_addr}AAA" $variant {
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53 0.5% .one;
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54 2.0% .two;
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55 * "";
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56 }
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57 </example>
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58 The value of the original string is hashed using MurmurHash2.
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59 In the example given, hash values from 0 to 21474835 (0.5%)
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60 correspond to the
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61 value <literal>".one"</literal> of the <var>$variant</var> variable,
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62 hash values from 21474836 to 107374180 (2%) correspond to
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63 the value <literal>".two"</literal>,
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64 and hash values from 107374181 to 4294967295 correspond to
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65 the value <literal>""</literal> (an empty string).
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66 </para>
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67
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68 </directive>
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70 </section>
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72 </module>