What is the fastest back-end database for OpenLDAP ?

What is the fastest back-end database for OpenLDAP ?

• hdb
• sql
• mdb
• bdb 

 

EXPLANATION

• A file with the MDB file extension is a Microsoft Access Database file that literally stands for Microsoft Database. ...
• MDB files contain database queries, tables, and more that can be used to link to and store data from other files, like XML and HTML, and applications, like Excel and SharePoint.

 

http://www.openldap.org/pub/hyc/mdm-paper.pdf

SOURCE

http://www.openldap.org/pub/hyc/mdm-paper.pdf