[pybsddb] Migration tool?

[Jesus Cea]

On 1/8/25 17:39, José María Mateos wrote:
> Hi,
> 
> I've been testing the old bsddb3 library (on Python 3.6) for a project 
> I'm writing and it works quite well. Thanks a lot for supporting this 
> library.
> 
> Recently, I've had to upgrade the Python version (to Python 3.11, for 
> the time being), hence I installed the berkeleydb library.
> 
> However, the files I created with bsddb3 are not compatible. See:
> 
> ```
> db_cursor = berkeleydb.btopen('/path/to/file.db', 'c')
> ...
> DBInvalidArgError: (22, 'Invalid argument -- BDB1009 /path/to/file.db: 
> unsupported btree version: 10')
> 
> ```
> 
> I have two questions about this:
> 
> 1. Is there any tool to migrate old DBs to the newer version?
> 
> 2. Is this kind of deprecation common, or I'm just encountering it 
> because I made a large jump in versions? I see a lot of BerkeleyDB 
> formats were dropped in the 18.1.0-pre announcement, so perhaps that's 
> what I'm seeing here.
> 
> Thanks a lot!

This is not related to the berkeleydb python bindings but to the 
underlying Oracle BerkeleyDB database engine.

What version of Oracle Berkeley DB are you using?.

Using the old "bsddb3", do this:

 >>> import bsddb3
 >>> bsddb3.db.version()

Using the new "berkeleydb", do this:

 >>> import berkeleydb
 >>> berkeleydb.db.version()

Send the two results to the mailing list.

Migration is documented in the Oracle Berkeley DB manual. We can talk 
about it when we know what versions are we talking about.

Have a nice weekend.

-- 
Jesús Cea Avión                         _/_/      _/_/_/        _/_/_/
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