1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>Release 3.2: DB_ENV->set_flags</title> 7 <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" /> 10 <link rel="up" href="upgrade_3_2_toc.html" title="Chapter��35.��Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2" /> 11 <link rel="prev" href="upgrade_3_2_toc.html" title="Chapter��35.��Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2" /> 12 <link rel="next" href="upgrade_3_2_callback.html" title="Release 3.2: DB callback functions, app_private field" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">Release 3.2: DB_ENV->set_flags</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="upgrade_3_2_toc.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��35.��Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2</th> 23 <td width="20%" align="right">��<a accesskey="n" href="upgrade_3_2_callback.html">Next</a></td> 24 </tr> 25 </table> 26 <hr /> 27 </div> 28 <div class="sect1" lang="en" xml:lang="en"> 29 <div class="titlepage"> 30 <div> 31 <div> 32 <h2 class="title" style="clear: both"><a id="upgrade_3_2_set_flags"></a>Release 3.2: DB_ENV->set_flags</h2> 33 </div> 34 </div> 35 </div> 36 <p>A new method has been added to the Berkeley DB environment handle, 37<a href="../api_reference/C/envset_flags.html" class="olink">DB_ENV->set_flags()</a>. This method currently takes three flags: 38<a href="../api_reference/C/envset_flags.html#set_flags_DB_CDB_ALLDB" class="olink">DB_CDB_ALLDB</a>, <a href="../api_reference/C/dbopen.html#open_DB_NOMMAP" class="olink">DB_NOMMAP</a>, and <a href="../api_reference/C/envset_flags.html#envset_flags_DB_TXN_NOSYNC" class="olink">DB_TXN_NOSYNC</a>. The 39first of these flags, <a href="../api_reference/C/envset_flags.html#set_flags_DB_CDB_ALLDB" class="olink">DB_CDB_ALLDB</a>, provides new functionality, 40allowing Berkeley DB Concurrent Data Store applications to do locking across multiple databases.</p> 41 <p>The other two flags, <a href="../api_reference/C/dbopen.html#open_DB_NOMMAP" class="olink">DB_NOMMAP</a> and <a href="../api_reference/C/envset_flags.html#envset_flags_DB_TXN_NOSYNC" class="olink">DB_TXN_NOSYNC</a>, were 42specified to the <a href="../api_reference/C/envopen.html" class="olink">DB_ENV->open()</a> method in previous releases. In 43the 3.2 release, they have been moved to the <a href="../api_reference/C/envset_flags.html" class="olink">DB_ENV->set_flags()</a> method 44because this allows the database environment's value to be toggled 45during the life of the application as well as because it is a more 46appropriate place for them. Applications specifying either the 47<a href="../api_reference/C/dbopen.html#open_DB_NOMMAP" class="olink">DB_NOMMAP</a> or <a href="../api_reference/C/envset_flags.html#envset_flags_DB_TXN_NOSYNC" class="olink">DB_TXN_NOSYNC</a> flags to the 48<a href="../api_reference/C/envopen.html" class="olink">DB_ENV->open()</a> method should replace those flags with calls to the 49<a href="../api_reference/C/envset_flags.html" class="olink">DB_ENV->set_flags()</a> method.</p> 50 </div> 51 <div class="navfooter"> 52 <hr /> 53 <table width="100%" summary="Navigation footer"> 54 <tr> 55 <td width="40%" align="left"><a accesskey="p" href="upgrade_3_2_toc.html">Prev</a>��</td> 56 <td width="20%" align="center"> 57 <a accesskey="u" href="upgrade_3_2_toc.html">Up</a> 58 </td> 59 <td width="40%" align="right">��<a accesskey="n" href="upgrade_3_2_callback.html">Next</a></td> 60 </tr> 61 <tr> 62 <td width="40%" align="left" valign="top">Chapter��35.��Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2��</td> 63 <td width="20%" align="center"> 64 <a accesskey="h" href="index.html">Home</a> 65 </td> 66 <td width="40%" align="right" valign="top">��Release 3.2: DB callback functions, app_private field</td> 67 </tr> 68 </table> 69 </div> 70 </body> 71</html> 72