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db5.3_recover - Online in the Cloud

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This is the command db5.3_recover that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


db5.3_recover - Restore the database to a consistent state

SYNOPSIS


db5.3_recover [-ceVv] [-h home] [-P password] [-t [[CC]YY]MMDDhhmm[.SS]]]

DESCRIPTION


The db5.3_recover utility must be run after an unexpected application, Berkeley DB, or
system failure to restore the database to a consistent state. All committed transactions
are guaranteed to appear after db5.3_recover has run, and all uncommitted transactions
will be completely undone.

OPTIONS


-c Perform catastrophic recovery instead of normal recovery.

-e Retain the environment after running recovery. This option will rarely be used
unless a DB_CONFIG file is present in the home directory. If a DB_CONFIG file is
not present, then the regions will be created with default parameter values.

-h Specify a home directory for the database environment; by default, the current
working directory is used.

-P Specify an environment password. Although Berkeley DB utilities overwrite password
strings as soon as possible, be aware there may be a window of vulnerability on
systems where unprivileged users can see command-line arguments or where utilities
are not able to overwrite the memory containing the command-line arguments.

-t Recover to the time specified rather than to the most current possible date. The
timestamp argument should be in the form [[CC]YY]MMDDhhmm[.SS] where each pair of
letters represents the following:

CC The first two digits of the year (the century).

YY The second two digits of the year. If "YY" is specified, but "CC" is not, a
value for "YY" between 69 and 99 results in a "CC" value of 19. Otherwise,
a "YY" value of 20 is used.

MM The month of the year, from 1 to 12.

DD The day of the month, from 1 to 31.

hh The hour of the day, from 0 to 23.

mm The minute of the hour, from 0 to 59.

SS The second of the minute, from 0 to 61.

If the "CC" and "YY" letter pairs are not specified, the values default to the
current year. If the "SS" letter pair is not specified, the value defaults to 0.

-V Write the library version number to the standard output, and exit.

-v Run in verbose mode.

In the case of catastrophic recovery, an archival copy - or snapshot - of all database
files must be restored along with all of the log files written since the database file
snapshot was made. (If disk space is a problem, log files may be referenced by symbolic
links).

If the failure was not catastrophic, the files present on the system at the time of
failure are sufficient to perform recovery.

If log files are missing, db5.3_recover will identify the missing log file(s) and fail, in
which case the missing log files need to be restored and recovery performed again.

The db5.3_recover utility uses a Berkeley DB environment (as described for the -h option,
the environment variable DB_HOME, or because the utility was run in a directory containing
a Berkeley DB environment). In order to avoid environment corruption when using a
Berkeley DB environment, db5.3_recover should always be given the chance to detach from
the environment and exit gracefully. To cause db5.3_recover to release all environment
resources and exit cleanly, send it an interrupt signal (SIGINT).

The db5.3_recover utility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT


DB_HOME
If the -h option is not specified and the environment variable DB_HOME is set, it
is used as the path of the database home, as described in DB_ENV->open.

AUTHORS


Sleepycat Software, Inc. This manual page was created based on the HTML documentation for
db_recover from Sleepycat, by Thijs Kinkhorst <thijs@kinkhorst.com>, for the Debian system
(but may be used by others).

28 January 2005 DB5.3_RECOVER(1)

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