60 lines
2.4 KiB
HTML
60 lines
2.4 KiB
HTML
<!--$Id: memp_sync.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
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<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
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<!--See the file LICENSE for redistribution information.-->
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<html>
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<head>
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<title>Berkeley DB: DbEnv::memp_sync</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
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</head>
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<body bgcolor=white>
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<table width="100%"><tr valign=top>
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<td>
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<b>DbEnv::memp_sync</b>
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</td>
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<td align=right>
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<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a>
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<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
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</tr></table>
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<hr size=1 noshade>
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<tt>
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<b><pre>
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#include <db_cxx.h>
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<p>
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int
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DbEnv::memp_sync(DbLsn *lsn);
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DbEnv::memp_sync</b>
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<p>The DbEnv::memp_sync method flushes modified pages in the cache to their
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backing files.</p>
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<p>Pages in the pool that cannot be immediately written back to disk (for
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example, pages that are currently in use by another thread of control)
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are waited for and written to disk as soon as it is possible to do
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so.</p>
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<p>The DbEnv::memp_sync method
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either returns a non-zero error value
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or throws an exception that encapsulates a non-zero error value on
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failure, and returns 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>lsn</b><ul compact><li>The purpose of the <b>lsn</b> parameter is to enable a transaction
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manager to ensure, as part of a checkpoint, that all pages modified by
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a certain time have been written to disk.
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<p>All modified pages with a a log sequence number (<a href="../api_cxx/lsn_class.html">DbLsn</a>) less
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than the <b>lsn</b> parameter are written to disk. If <b>lsn</b> is
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NULL, all modified pages in the pool are written to disk.</p></ul>
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<br>
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<hr size=1 noshade>
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<br><b>Class</b>
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<a href="../api_cxx/env_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a>
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<br><b>See Also</b>
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<a href="../api_cxx/memp_list.html">Memory Pools and Related Methods</a>
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</tt>
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<table width="100%"><tr><td><br></td><td align=right>
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<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
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</body>
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</html>
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