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Remove obsolete references to bsddb

This commit is contained in:
Antoine Pitrou 2011-12-05 00:41:51 +01:00
parent d0784b75cb ae44b7a099
commit 6da394cfe7
1 changed files with 0 additions and 46 deletions
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Doc/faq/library.rst
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@ -814,52 +814,6 @@ than a third of a second. This often beats doing something more complex and
general such as using gdbm with pickle/shelve.
If my program crashes with a bsddb (or anydbm) database open, it gets corrupted. How come?
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.. XXX move this FAQ entry elsewhere?
.. note::
The bsddb module is now available as a standalone package `pybsddb
<http://www.jcea.es/programacion/pybsddb.htm>`_.
Databases opened for write access with the bsddb module (and often by the anydbm
module, since it will preferentially use bsddb) must explicitly be closed using
the ``.close()`` method of the database. The underlying library caches database
contents which need to be converted to on-disk form and written.
If you have initialized a new bsddb database but not written anything to it
before the program crashes, you will often wind up with a zero-length file and
encounter an exception the next time the file is opened.
I tried to open Berkeley DB file, but bsddb produces bsddb.error: (22, 'Invalid argument'). Help! How can I restore my data?
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.. XXX move this FAQ entry elsewhere?
.. note::
The bsddb module is now available as a standalone package `pybsddb
<http://www.jcea.es/programacion/pybsddb.htm>`_.
Don't panic! Your data is probably intact. The most frequent cause for the error
is that you tried to open an earlier Berkeley DB file with a later version of
the Berkeley DB library.
Many Linux systems now have all three versions of Berkeley DB available. If you
are migrating from version 1 to a newer version use db_dump185 to dump a plain
text version of the database. If you are migrating from version 2 to version 3
use db2_dump to create a plain text version of the database. In either case,
use db_load to create a new native database for the latest version installed on
your computer. If you have version 3 of Berkeley DB installed, you should be
able to use db2_load to create a native version 2 database.
You should move away from Berkeley DB version 1 files because the hash file code
contains known bugs that can corrupt your data.
Mathematics and Numerics
========================