Hi, Just to nail down exactly what we've done with openldap on the Oxford site BDII - we have the attached yum repo file on the BDII which points to a repo that contains the newer openldap, and some other stuff. Our repo file restricts yum to only installing openldap24 and nothing else from there. We then install the openldap24 and openldap24-servers packages which install in parallel to the standard system packages, rather than upgrading them. You then need to add the lines: # Tweak to use SA-1 openldap24 SLAPD=/opt/openldap2.4/sbin/slapd export LD_LIBRARY_PATH=/opt/openldap2.4/lib64 to the end of the file '/opt/bdii/etc/bdii.conf' to actually make it use the new ldap. Then restart things to pick up the changes. Before we did this we'd have the ldap server freeze (but not die) completely multiple times a day, since doing this it's been fine. This all dates back a bit, there may be a better way of doing it now. Ewan