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<h2 class="title"><a id="lsn"></a>Chapter 8.
The DbLsn Handle
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<pre class="programlisting">#include <db_cxx.h>
class DbLsn : public DB_LSN { ... }; </pre>
<p>
The <code class="classname">DbLsn</code> object is a <span class="emphasis"><em>log sequence number</em></span>
which specifies a unique location in a log file. A <code class="classname">DbLsn</code>
consists of two unsigned 32-bit integers -- one specifies the log file number, and the other
specifies an offset in the log file.
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<a class="xref" href="logarchive.html" title="DbEnv::log_archive()">DbEnv::log_archive()</a>
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<td>List log and database files</td>
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<a class="xref" href="logfile.html" title="DbEnv::log_file()">DbEnv::log_file()</a>
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<td>Map Log Sequence Numbers to log files</td>
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<a class="xref" href="logflush.html" title="DbEnv::log_flush()">DbEnv::log_flush()</a>
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<td>Flush log records</td>
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<a class="xref" href="logprintf.html" title="DbEnv::log_printf()">DbEnv::log_printf()</a>
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<td>Append informational message to the log</td>
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<a class="xref" href="logput.html" title="DbEnv::log_put()">DbEnv::log_put()</a>
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<a class="xref" href="logstat.html" title="DbEnv::log_stat()">DbEnv::log_stat()</a>
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<td>Return log subsystem statistics</td>
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<a class="xref" href="logstat_print.html" title="DbEnv::log_stat_print()">DbEnv::log_stat_print()</a>
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<td>Print log subsystem statistics</td>
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<a class="xref" href="logcompare.html" title="DbEnv::log_compare()">DbEnv::log_compare()</a>
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<td>Compare two Log Sequence Numbers</td>
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<strong>Logging Subsystem Cursors</strong>
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<a class="xref" href="logcursor.html" title="DbEnv::log_cursor()">DbEnv::log_cursor()</a>
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<td>Create a log cursor handle</td>
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The DbLogc Handle
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<td>A log cursor handle</td>
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<a class="xref" href="logcclose.html" title="DbLogc::close()">DbLogc::close()</a>
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<td>Close a log cursor</td>
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<a class="xref" href="logcget.html" title="DbLogc::get()">DbLogc::get()</a>
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<strong>Logging Subsystem Configuration</strong>
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<td><a class="xref" href="envlog_set_config.html" title="DbEnv::log_set_config()">DbEnv::log_set_config()</a>, <a class="xref" href="envlog_get_config.html" title="DbEnv::log_get_config()">DbEnv::log_get_config()</a></td>
<td>Configure the logging subsystem</td>
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<td><a class="xref" href="envset_lg_bsize.html" title="DbEnv::set_lg_bsize()">DbEnv::set_lg_bsize()</a>, <a class="xref" href="envget_lg_bsize.html" title="DbEnv::get_lg_bsize()">DbEnv::get_lg_bsize()</a></td>
<td>Set/get log buffer size</td>
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<td><a class="xref" href="envset_lg_dir.html" title="DbEnv::set_lg_dir()">DbEnv::set_lg_dir()</a>, <a class="xref" href="envget_lg_dir.html" title="DbEnv::get_lg_dir()">DbEnv::get_lg_dir()</a></td>
<td>Set/get the environment logging directory</td>
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<td><a class="xref" href="envset_lg_filemode.html" title="DbEnv::set_lg_filemode()">DbEnv::set_lg_filemode()</a>, <a class="xref" href="envget_lg_filemode.html" title="DbEnv::get_lg_filemode()">DbEnv::get_lg_filemode()</a></td>
<td>Set/get log file mode</td>
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<td><a class="xref" href="envset_lg_max.html" title="DbEnv::set_lg_max()">DbEnv::set_lg_max()</a>, <a class="xref" href="envget_lg_max.html" title="DbEnv::get_lg_max()">DbEnv::get_lg_max()</a></td>
<td>Set/get log file size</td>
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<td><a class="xref" href="envset_lg_regionmax.html" title="DbEnv::set_lg_regionmax()">DbEnv::set_lg_regionmax()</a>, <a class="xref" href="envget_lg_regionmax.html" title="DbEnv::get_lg_regionmax()">DbEnv::get_lg_regionmax()</a></td>
<td>Set/get logging region size</td>
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