Re: [openldap2.1.30 + BerkeleyDB4.2.52] performance problem

[Quanah Gibson-Mount <quanah@stanford.edu>]

--On Tuesday, March 01, 2005 9:26 AM +0100 Helene.Lastennet@alcatel.fr 
wrote:

> Hi,
>
> We have some problem of performance since we have changed the version of
> Openldap + BerkeleyDB:
> Mainly at the ldap add request level.
>
> Current environnment:
> BerkeleyDB 4.2.52
> Openldap 2.1.30
>
> Previous environnment:
> BerkeleyDB 4.1.25
> Openldap 2.1.22

Helene,

Around a year ago, I did a comprehensive comparison of BDB 4.1 and 4.2 when 
used with OpenLDAP 2.1.  The essential answer here is if you are using 
OpenLDAP 2.1, I suggest using BDB 4.1, simply because of the exact reasons 
you are seeing.  OpenLDAP 2.1 uses a hash structure for storing its data, 
and BDB 4.1 does a better job of writing those types of databases than BDB 
4.2.  OpenLDAP 2.2 uses btrees instead of hashes, and BDB 4.2 does a better 
job of storing its data in that DB format than BDB 4.1.

So, if you are using OL 2.1, use BDB 4.1.  OL 2.2, BDB 4.2. :)

--Quanah

--
Quanah Gibson-Mount
Principal Software Developer
ITSS/Shared Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html