The following are the standalone utilities that provide
supporting functionality for the Berkeley DB
environment:
-
db_archive utility
-
The db_archive utility supports database backup and
archival, and log file administration. It facilitates
log reclamation and the creation of database
snapshots. Generally, some form of log archival must
be done if a database environment has been configured
for logging or transactions.
-
db_checkpoint utility
-
The db_checkpoint utility runs as a daemon process,
monitoring the database log and periodically issuing
checkpoints. It facilitates log reclamation and the
creation of database snapshots. Generally, some form
of database checkpointing must be done if a database
environment has been configured for
transactions.
-
db_deadlock utility
-
The db_deadlock utility runs as a daemon process,
periodically traversing the database lock structures
and aborting transactions when it detects a deadlock.
Generally, some form of deadlock detection must be
done if a database environment has been configured for
locking.
-
db_dump utility
-
The db_dump utility writes a copy of the database to a
flat-text file in a portable format.
-
db_hotbackup utility
-
The db_hotbackup utility creates "hot backup" or "hot
failover" snapshots of Berkeley DB database
environments.
-
db_load utility
-
The db_load utility reads the flat-text file produced
by the db_load utility and loads it into a database
file.
-
db_printlog utility
-
The db_printlog utility displays the contents of
Berkeley DB log files in a human-readable and parsable
format.
-
db_recover utility
-
The db_recover utility runs after an unexpected
Berkeley DB or system failure to restore the database
to a consistent state. Generally, some form of
database recovery must be done if databases are being
modified.
-
db_stat utility
-
The db_stat utility displays statistics for databases
and database environments.
-
db_tuner utility
-
The db_tuner utility suggests a page size for btree
databases that optimizes cache efficiency and storage
space requirements.
-
db_upgrade utility
-
The db_upgrade utility provides a command-line
interface for upgrading underlying database
formats.
-
db_verify utility
-
The db_verify utility provides a command-line
interface for verifying the database
format.
All of the functionality implemented for these utilities is
also available as part of the standard Berkeley DB API. This
means that threaded applications can easily create a thread
that calls the same Berkeley DB functions as do the utilities.
This often simplifies an application environment by removing
the necessity for multiple processes to negotiate database and
database environment creation and shut down.