Re: search mechanism in openldap

[Howard Chu <hyc@symas.com>]

Kamal R. Prasad wrote:
> Hello,
>
> I am working on a software that wishes to generate hierarchial 
> information
> from a relational database. It is also supposed to accept queries like 
> (get
> me objevt from this tree AND this tree) or (get me object with attribute
> value = X and object with attrval = Y).
>
>  I found that openldap already has this functionality. However, I have no
> requirement for the data to be accessed across machines as the ldap 
> protocol
> enables. Is there anyway one can bypass the ldap server to achieve this
> functionality -or where exactly is this functionality present?

Just run the slapd server with a local-only listener. The query language 
that LDAP supports is part of the protocol definition; you can't feed in 
those queries without using the LDAP protocol.
> Does openldap optimize searches in some way? Who exactly handles the
> searches when a client sends in a request? is it slapd or berkeley 
> db4? What
> is the performance overhead of running slapd on the same box just to get
> this functionality?
Berkeley DB is obviously not a relational database, it knows nothing 
about filters or query languages. It sounds to me like you haven't read 
enough documentation yet to warrant one approach or another. If you're 
worried about performance overhead, the only thing to do is actually run 
it and measure it to see if it meets your requirements.

--
 -- Howard Chu
 Chief Architect, Symas Corp.  http://www.symas.com
 Director, Highland Sun        http://highlandsun.com/hyc
 OpenLDAP Core Team            http://www.openldap.org/project/