Chapter 7. The DB_LSN Handle
#include <db.h>
typedef struct __typedef struct __db_lsn DB_LSN; ; The DB_LSN object is a log sequence number which specifies a unique location in a log file. A DB_LSN consists of two unsigned 32-bit integers -- one specifies the log file number, and the other specifies an offset in the log file.
Logging Subsystem and Related Methods
| Logging Subsystem and Related Methods | Description |
|---|---|
| DB_ENV->log_archive() | List log and database files |
| DB_ENV->log_file() | Map Log Sequence Numbers to log files |
| DB_ENV->log_flush() | Flush log records |
| DB_ENV->log_printf() | Append informational message to the log |
| DB_ENV->log_put() | Write a log record |
| DB_ENV->log_stat() | Return log subsystem statistics |
| DB_ENV->log_stat_print() | Print log subsystem statistics |
| log_compare | Compare two Log Sequence Numbers |
| Logging Subsystem Cursors | |
| DB_ENV->log_cursor() | Create a log cursor handle |
| The DB_LOGC Handle | A log cursor handle |
| DB_LOGC->close() | Close a log cursor |
| DB_LOGC->get() | Retrieve a log record |
| Logging Subsystem Configuration | |
| DB_ENV->log_set_config(), DB_ENV->log_get_config() | Configure the logging subsystem |
| DB_ENV->set_lg_bsize(), DB_ENV->get_lg_bsize() | Set/get log buffer size |
| DB_ENV->set_lg_dir(), DB_ENV->get_lg_dir() | Set/get the environment logging directory |
| DB_ENV->set_lg_filemode(), DB_ENV->get_lg_filemode() | Set/get log file mode |
| DB_ENV->set_lg_max(), DB_ENV->get_lg_max() | Set/get log file size |
| DB_ENV->set_lg_regionmax(), DB_ENV->get_lg_regionmax() | Set/get logging region size |