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HTML
84 lines
4.1 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>rep_set_request</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
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<link rel="up" href="configuration_reference.html" title="Appendix B. DB_CONFIG Parameter Reference" />
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<link rel="prev" href="rep_set_priority_parameter.html" title="rep_set_priority" />
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<link rel="next" href="rep_set_timeout_parameter.html" title="rep_set_timeout" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">rep_set_request</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="rep_set_priority_parameter.html">Prev</a> </td>
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<th width="60%" align="center">Appendix B. DB_CONFIG Parameter Reference</th>
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<td width="20%" align="right"> <a accesskey="n" href="rep_set_timeout_parameter.html">Next</a></td>
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</table>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="rep_set_request_parameter"></a>rep_set_request</h2>
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</div>
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</div>
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</div>
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<p>
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Sets a threshold for the minimum and maximum
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time that a client waits before requesting retransmission of a missing message.
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</p>
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<p>
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The syntax of this parameter in the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is a
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single line with the string
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<code class="literal">rep_set_request</code>, one or more whitespace
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characters, and the request time specified in two parts:
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the min and the max. Specifically, if the client detects a
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gap in the sequence of incoming log records or database
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pages, Berkeley DB will wait for at least min microseconds
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before requesting retransmission of the missing record.
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Berkeley DB will double that amount before requesting the
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same missing record again, and so on, up to a maximum
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threshold of max microseconds.
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</p>
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<p>By default the minimum is 40000 and the maximum is 1280000 (1.28 seconds). These defaults
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are fairly arbitrary and the application likely needs to adjust these. The values should be
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based on expected load and performance characteristics of the master and client host
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platforms and transport infrastructure as well as round-trip message time.
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</p>
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<p>For more information, see <a class="xref" href="repset_request.html" title="DbEnv::rep_set_request()">DbEnv::rep_set_request()</a>. </p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="rep_set_priority_parameter.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="configuration_reference.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="rep_set_timeout_parameter.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">rep_set_priority </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> rep_set_timeout</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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