Mercurial > hg > nginx-site
annotate xml/en/docs/stream/ngx_stream_split_clients_module.xml @ 1777:8b1ef02c8686
Corrected examples in ngx_stream_log_module.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Fri, 09 Sep 2016 18:51:33 +0300 |
parents | 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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8 |
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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" |
589 | 11 lang="en" |
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12 rev="2"> |
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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 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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22 |
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23 |
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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 ... |
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30 split_clients "${remote_addr}AAA" $upstream { |
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31 0.5% feature_test1; |
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32 2.0% feature_test2; |
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33 * production; |
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34 } |
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35 |
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36 server { |
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37 ... |
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38 proxy_pass $upstream; |
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39 } |
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40 } |
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41 </example> |
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42 </para> |
364 | 43 |
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44 </section> |
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45 |
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46 |
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47 <section id="directives" name="Directives"> |
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48 |
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49 <directive name="split_clients"> |
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50 <syntax block="yes"> |
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51 <value>string</value> |
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52 <value>$variable</value></syntax> |
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53 <default/> |
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54 <context>stream</context> |
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55 |
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56 <para> |
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57 Creates a variable for A/B testing, for example: |
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58 <example> |
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59 split_clients "${remote_addr}AAA" $variant { |
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60 0.5% .one; |
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61 2.0% .two; |
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62 * ""; |
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63 } |
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64 </example> |
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65 The value of the original string is hashed using MurmurHash2. |
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66 In the example given, hash values from 0 to 21474835 (0.5%) |
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68 value <literal>".one"</literal> of the <var>$variant</var> variable, | |
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69 hash values from 21474836 to 107374180 (2%) correspond to |
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70 the value <literal>".two"</literal>, |
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71 and hash values from 107374181 to 4294967295 correspond to |
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72 the value <literal>""</literal> (an empty string). |
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73 </para> |
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74 |
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75 </directive> |
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76 |
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77 </section> |
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78 |
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79 </module> |