Thanks for the recommendations.
I was under the impression 2.5 was the LTS version, but I do see others are often recommended to 2.6. Why 2.6 over the long term support 2.5?
Also, why the standard syncrepl recommendation? Delta syncrepl style approach seems to be along the typical industry standard sync strategy for databases like mongodb as an example with their "oplog". From what I understand the accesslog in OpenLDAP is analogous to the oplog from mongodb. Is the OpenLDAP project discontinuing Delta Syncrepl support?