[pybsddb] DBEnv open fails with DBNoSuchFileError

[Jesus Cea]

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Yongqian Li wrote:
> The following code fails for me:
> 
>>>> bsddb.db.DBEnv().open('C:\\tmp\\test')
> 
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     bsddb.db.DBEnv().open('C:\\tmp\\test')
> DBNoSuchFileError: (2, 'No such file or directory')
> 
> I have confirmed that the directory 'C:\\tmp\\test' does exist.
> 
> This occurs on Vista x64 as well as Ubuntu x64 with python-2.5.2
> 
> I cannot figure out what is the problem. Please help!

You need to pass a few flags to the "open" flag. Read Oracle Berkeley DB
documentation (it is very good). For example:
<http://www.oracle.com/technology/documentation/berkeley-db/db/api_c/env_open.html>
and the chapter about transactions:
<http://www.oracle.com/technology/documentation/berkeley-db/db/ref/transapp/intro.html>

In particular, you probably need to initialize a few subsystems, like
DB_INIT_TXN, DB_INIT_MPOOL, DB_INIT_LOG, DB_INIT_LOCK, and do a DB_RECOVER.

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