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Berkeley DB: DB_ENV->set_lg_dir
DB_ENV->set_lg_dir
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#include <db.h>
int
DB_ENV->set_lg_dir(DB_ENV *dbenv, const char *dir);
int
DB_ENV->get_lg_dir(DB_ENV *dbenv, const char **dirp);
Description: DB_ENV->set_lg_dir
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.
If no logging directory is specified, log files are created in the
environment home directory. See Berkeley DB File Naming for more information.
For the greatest degree of recoverability from system or application
failure, database files and log files should be located on separate
physical devices.
The database environment's logging directory may also be set using the environment's
DB_CONFIG 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 DB_CONFIG file is read when the database
environment is opened, it will silently overrule configuration done
before that time.
The DB_ENV->set_lg_dir method configures operations performed using the specified
DB_ENV handle, not all operations performed on the underlying
database environment.
The DB_ENV->set_lg_dir method may not be called after the DB_ENV->open method is
called.
If the database environment already exists when
DB_ENV->open is called, the information specified to DB_ENV->set_lg_dir
must be consistent with the existing environment or corruption can
occur.
The DB_ENV->set_lg_dir method
returns a non-zero error value on failure
and 0 on success.
Parameters
- dir
- The dir parameter is the directory used to store the logging files.
On Windows, the dir argument will be interpreted as a UTF-8
string, which is equivalent to ASCII for Latin characters.
Errors
The DB_ENV->set_lg_dir method
may fail and return one of the following non-zero errors:
- EINVAL
- If the method was called after DB_ENV->open was called; or if an
invalid flag value or parameter was specified.
Description: DB_ENV->get_lg_dir
The DB_ENV->get_lg_dir method returns the log directory.
The DB_ENV->get_lg_dir method may be called at any time during the life of the
application.
The DB_ENV->get_lg_dir method
returns a non-zero error value on failure
and 0 on success.
Parameters
- dirp
- The DB_ENV->get_lg_dir method returns a reference to the
log directory in dirp.
Class
DB_ENV, DB_LOGC, DB_LSN
See Also
Logging Subsystem and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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