DbEnv::set_lg_dir(const char *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
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
The DbEnv::set_lg_dir method configures operations performed using the specified
DbEnv handle, not all operations performed on the underlying
The DbEnv::set_lg_dir interface may not be called after the DbEnv::open
interface is called.
If the database environment already exists when
DbEnv::open is called, the information specified to DbEnv::set_lg_dir
must be consistent with the existing environment or corruption can
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.
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 DbEnv::set_lg_dir method may fail and throw an exception or return a non-zero error for the following conditions:
- An invalid flag value or parameter was specified.
Called after DbEnv::open was called.
The DbEnv::set_lg_dir method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv::set_lg_dir method may fail and
either return DB_RUNRECOVERY or throw a
in which case all subsequent Berkeley DB calls will fail in the same way.
DbEnv, DbLogc, DbLsn
Logging Subsystem and Related Methods
Copyright Sleepycat Software