competition

[Sebastian Hagedorn]

--On 22. September 2010 07:47:26 -0400 Jeffrey T Eaton <jeaton at cmu.edu> 
wrote:

> All of that said, I believe that, in general, you can safely upgrade BDB.
> If you have a Cyrus installation using BDB X, you can drop in a new Cyrus
> using BDB Y, as long as everything is shut down in between.  You can't go
> back without effort, but upgrades should work.

I'm pretty sure that's not true. *If* an application uses BDB's environment 
features (not all do!), you *cannot* simply upgrade, unless the application 
is programmed to perform the upgrade automatically. Otherwise you have to 
either use db_upgrade to convert the environment to the current version, or 
you use db_dump and db_load. There's a db_upgrade() call in the library 
that could be used, but it might not work in all cases:

Errors
The DB->upgrade() method may fail and return one of the following non-zero 
errors:

DB_OLD_VERSION - The database cannot be upgraded by this version of the 
Berkeley DB software.
-- 
     .:.Sebastian Hagedorn - RZKR-R1 (Gebäude 52), Zimmer 18.:.
                 .:.Regionales Rechenzentrum (RRZK).:.
.:.Universität zu Köln / Cologne University - ✆ +49-221-478-5587.:.
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