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<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>Backup Method </title><link rel="stylesheet" type="text/css" href="../styles/presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="BerkeleyDB" /><meta name="file" content="M_BerkeleyDB_DatabaseEnvironment_Backup" /><meta name="guid" content="M_BerkeleyDB_DatabaseEnvironment_Backup" /><xml><MSHelp:Attr Name="AssetID" Value="M:BerkeleyDB.DatabaseEnvironment.Backup(System.String,BerkeleyDB.BackupOptions)" /><MSHelp:TOCTitle Title="Backup Method " /><MSHelp:RLTitle Title="DatabaseEnvironment.Backup Method (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="M:BerkeleyDB.DatabaseEnvironment.Backup(System.String,BerkeleyDB.BackupOptions)" /><MSHelp:Keyword Index="A" Term="frlrfBerkeleyDBDatabaseEnvironmentClassBackupTopic" /><MSHelp:Keyword Index="K" Term="Backup method" /><MSHelp:Keyword Index="K" Term="DatabaseEnvironment.Backup method" /><MSHelp:Keyword Index="F" Term="Backup" /><MSHelp:Keyword Index="F" Term="DatabaseEnvironment.Backup" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.DatabaseEnvironment.Backup" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet53.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.DatabaseEnvironment.Backup" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="Perform a hot back up of the open environment. 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Perform a hot back up of the open environment.
<p>
All files used by the environment are backed up, so long as the
normal rules for file placement are followed. For information on how
files are normally placed relative to the environment directory, see
the "Berkeley DB File Naming" section in the Berkeley DB Reference
Guide.
</p><p>
By default, data directories and the log directory specified
relative to the home directory will be recreated relative to the
target directory. If absolute path names are used, then use the
<a href="F_BerkeleyDB_BackupOptions_SingleDir.htm">SingleDir</a> method.
</p><p>
This method provides the same functionality as the db_hotbackup
utility. However, this method does not perform the housekeeping
actions performed by that utility. In particular, you may want to
run a checkpoint before calling this method. To run a checkpoint,
use the <a href="M_BerkeleyDB_DatabaseEnvironment_Checkpoint.htm">Checkpoint<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a> method. For
more information on checkpoints, see the "Checkpoint" section in the
Berkeley DB Reference Guide.
</p><p>
To back up a single database file within the environment, use the
<a href="M_BerkeleyDB_DatabaseEnvironment_BackupDatabase.htm">BackupDatabase(String, String, Boolean)</a> method.
</p><p>
In addition to the configuration options available using the
<a href="T_BerkeleyDB_BackupOptions.htm">BackupOptions</a> class, additional tuning modifications
can be made using the <a href="P_BerkeleyDB_DatabaseEnvironment_BackupReadCount.htm">BackupReadCount</a>,
<a href="P_BerkeleyDB_DatabaseEnvironment_BackupReadSleepDuration.htm">BackupReadSleepDuration</a>,
<a href="P_BerkeleyDB_DatabaseEnvironment_BackupBufferSize.htm">BackupBufferSize</a>, and
<a href="P_BerkeleyDB_DatabaseEnvironment_BackupWriteDirect.htm">BackupWriteDirect</a> properties.
Alternatively, you can write your own custom hot back up facility
using the <a href="T_BerkeleyDB_IBackup.htm">IBackup</a> interface.
</p></div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">void</span> <span class="identifier">Backup</span>(
<a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">string</a> <span class="parameter">target</span>,
<a href="T_BerkeleyDB_BackupOptions.htm">BackupOptions</a> <span class="parameter">opt</span>
)</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Sub</span> <span class="identifier">Backup</span> ( _
<span class="parameter">target</span> <span class="keyword">As</span> <a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">String</a>, _
<span class="parameter">opt</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_BackupOptions.htm">BackupOptions</a> _
)</pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span>:
<span class="keyword">void</span> <span class="identifier">Backup</span>(
<a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">String</a>^ <span class="parameter">target</span>,
<a href="T_BerkeleyDB_BackupOptions.htm">BackupOptions</a>^ <span class="parameter">opt</span>
)</pre></td></tr></table></span></div><div id="parameters"><h4 class="subHeading">Parameters</h4><dl paramName="target"><dt><span class="parameter">target</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">System<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>String</a><br />Identifies the directory in which the back up
will be placed. Any subdirectories required to contain the back up
must be placed relative to this directory. Note that if an
<a href="T_BerkeleyDB_IBackup.htm">IBackup</a> is configured for the environment, then the
value specified to this parameter is passed on to the
<a href="M_BerkeleyDB_IBackup_Open.htm">Open(String, String)</a> method. If this parameter is null, then
the target must be specified to the <a href="M_BerkeleyDB_IBackup_Open.htm">Open(String, String)</a>
method.
<p>
This directory, and any required subdirectories, will be created for
you if you specify <a href="T_BerkeleyDB_CreatePolicy.htm">IF_NEEDED</a> or
<a href="T_BerkeleyDB_CreatePolicy.htm">ALWAYS</a> for the
<a href="F_BerkeleyDB_BackupOptions_Creation.htm">Creation</a> property.
</p></dd></dl><dl paramName="opt"><dt><span class="parameter">opt</span></dt><dd>Type: <a href="T_BerkeleyDB_BackupOptions.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>BackupOptions</a><br />The <a href="T_BerkeleyDB_BackupOptions.htm">BackupOptions</a> instance used to
configure the hot back up.</dd></dl></div></div><h1 class="heading"><span onclick="ExpandCollapse(seeAlsoToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(seeAlsoToggle, event)" tabindex="0"><img id="seeAlsoToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />See Also</span></h1><div id="seeAlsoSection" class="section" name="collapseableSection" style=""><div class="seeAlsoStyle"><a href="T_BerkeleyDB_DatabaseEnvironment.htm">DatabaseEnvironment Class</a></div><div class="seeAlsoStyle"><a href="N_BerkeleyDB.htm">BerkeleyDB Namespace</a></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"> </span>
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