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<h1>DbEnv::set_lg_dir</h1>
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<h3><pre>
#include &lt;db_cxx.h&gt;
<p>
int
DbEnv::set_lg_dir(const char *dir);
</pre></h3>
<h1>Description</h1>
<p>The path of a directory to be used as the location of logging files.
Log files created by the Log Manager subsystem will be created in this
directory.
<p>If no logging directory is specified, log files are created in the
environment home directory.   See <a href="../ref/env/naming.html">Berkeley DB File Naming</a> for more information.
<p>For the greatest degree of recoverability from system or application
failure, database files and log files should be located on separate
physical devices.
<p>The DbEnv::set_lg_dir interface may only be used to configure Berkeley DB before
the <a href="../api_cxx/env_open.html">DbEnv::open</a> interface is called.
<p>The DbEnv::set_lg_dir method either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
<p>The database environment's logging directory may also be set using the environment's
<b>DB_CONFIG</b> file.  The syntax of the entry in that file is a
single line with the string "set_lg_dir", one or more whitespace characters,
and the directory name.  Because the <b>DB_CONFIG</b> file is read when the database
environment is opened, it will silently overrule configuration done
before that time.
<h1>Errors</h1>
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
<p>Called after <a href="../api_cxx/env_open.html">DbEnv::open</a> was called.
</dl>
<h3>Class</h3>
<a href="../api_cxx/dbenv_class.html">DbEnv</a>
<h1>See Also</h1>
<a href="../api_cxx/env_close.html">DbEnv::close</a>,
<a href="../api_cxx/env_open.html">DbEnv::open</a>,
<a href="../api_cxx/env_remove.html">DbEnv::remove</a>,
<a href="../api_cxx/db_err.html">DbEnv::err</a>,
<a href="../api_cxx/env_strerror.html">DbEnv::strerror</a>,
<a href="../api_cxx/env_version.html">DbEnv::version</a>,
<a href="../api_cxx/env_set_cachesize.html">DbEnv::set_cachesize</a>,
<a href="../api_cxx/env_set_errcall.html">DbEnv::set_errcall</a>,
<a href="../api_cxx/env_set_errfile.html">DbEnv::set_errfile</a>,
<a href="../api_cxx/env_set_error_stream.html">DbEnv::set_error_stream</a>,
<a href="../api_cxx/env_set_errpfx.html">DbEnv::set_errpfx</a>,
<a href="../api_cxx/env_set_flags.html">DbEnv::set_flags</a>,
<a href="../api_cxx/env_set_mutexlocks.html">DbEnv::set_mutexlocks</a>,
<a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a>,
and
<a href="../api_cxx/env_set_verbose.html">DbEnv::set_verbose</a>.
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