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slow dereferencing

To: openldap-software@OpenLDAP.org
Subject: slow dereferencing
From: Robert Petkus <rpetkus@bnl.gov>
Date: Fri, 09 Sep 2005 17:04:45 -0400
User-agent: Mozilla Thunderbird 1.0.2-1.3.3 (X11/20050513)

Folks, Is there a way to speed up dereferenced searches? I have one ldap server with 2 subordinate DCs and several thousand duplicate user accounts. We have an application that modifies these account attributes to track jobs on the grid. Since only the DC differs between these 2 accounts I created aliases like so:

dn: uid=grid0001,ou=People,dc=one,dc=bnl,dc=gov
uid: grid0001
objectClass: alias
objectClass: extensibleObject
aliasedObjectName: uid=grid0001,ou=People,dc=two,dc=bnl,dc=gov

The client ldap.conf has
DEREF searching
scope one

The server slapd.conf has
maxderefdepth 1

Performance is horrendous though when these derefs are followed. Any tips to increase performance -- anything I'm missing?

Thanks,
Robert

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