db5.3_upgrade - Online in the Cloud

PROGRAM:

NAME

db5.3_upgrade - Upgrade the Berkeley DB version to the current release version.

SYNOPSIS

db5.3_upgrade [-NsVv] [-h home] [-P password] file ...

DESCRIPTION

The db5.3_upgrade utility upgrades the Berkeley DB version of one or more files and the
databases they contain to the current release version.

OPTIONS

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

-N Do not acquire shared region mutexes while running. Other problems, such as
potentially fatal errors in Berkeley DB, will be ignored as well. This option is
intended only for debugging errors, and should not be used under any other
circumstances.

-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.

-s This flag is only meaningful when upgrading databases from releases before the
Berkeley DB 3.1 release.

As part of the upgrade from the Berkeley DB 3.0 release to the 3.1 release, the on-
disk format of duplicate data items changed. To correctly upgrade the format
requires that applications specify whether duplicate data items in the database are
sorted or not. Specifying the -s flag means that the duplicates are sorted;
otherwise, they are assumed to be unsorted. Incorrectly specifying the value of
this flag may lead to database corruption.

Because the db5.3_upgrade utility upgrades a physical file (including all the
databases it contains), it is not possible to use db5.3_upgrade to upgrade files
where some of the databases it includes have sorted duplicate data items, and some
of the databases it includes have unsorted duplicate data items. If the file does
not have more than a single database, if the databases do not support duplicate
data items, or if all the databases that support duplicate data items support the
same style of duplicates (either sorted or unsorted), db5.3_upgrade will work
correctly as long as the -s flag is correctly specified. Otherwise, the file cannot
be upgraded using db5.3_upgrade, and must be upgraded manually using the db5.3_dump
and db5.0_load utilities.

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

-v Run in verbose mode, displaying a message for each successful upgrade.

It is important to realize that Berkeley DB database upgrades are done in place, and so
are potentially destructive. This means that if the system crashes during the upgrade
procedure, or if the upgrade procedure runs out of disk space, the databases may be left
in an inconsistent and unrecoverable state.

The db5.3_upgrade utility may be used with 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_upgrade should always be given the chance to detach
from the environment and exit gracefully. To cause db5.3_upgrade to release all
environment resources and exit cleanly, send it an interrupt signal (SIGINT).

The db5.3_upgrade 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_upgrade from Sleepycat, by Thijs Kinkhorst <thijs@kinkhorst.com>, for the Debian system
(but may be used by others).

28 January 2005 DB5.3_UPGRADE(1)

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