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Re: bdb backend - reliable or not?
Tomasz Chmielewski wrote:
Unfortunately, the choice was a disaster - a couple of tests showed that
after powering off the server, OpenLDAP is not able to start anymore -
all I see in logs is a single message (loglevel 256):
bdb_db_open: unclean shutdown detected; attempting recovery.
And that's it, it never recovers.
As others have mentioned, you need to run `db_recover` on your database.
On the other hand, I didn't have problems with ldbm on 2.3.6, or on any
older OpenLDAP version, so can one conclude that ldbm is more reliable
More crash-resistant? Probably. BDB has a lot of performance features,
some of which make it more fragile to system instability. I think you
will find that almost all "decent" databases, and many other
applications including the file system itself, have problems with
Will an upgrade to 2.3.24 solve my problems with bdb, or shall I revert
back to ldbm?
Don't use ldbm, unless you have a powerful server and a small number of
users; and don't mind getting left out of future releases.
Performance is not an issue here, databases are relatively small.
What is important is the ability to survive unexpected system
Then put the db_recover command in your start-up script, and/or tune BDB
so that it can survive a crash more easily. But if you are experiencing
unexpected crash/poweroff I'd say you have more serious issues than
whether to use ldbm or bdb.
Perfection is just a word I use occasionally with mustard.
DigiPen Institute of Technology