It does not remove data and just marks it as 'free' meaning that it is reusable for new write operations?
Correct.
I use mdb from openldap 2.4.33
This version of MDB is not stable and can randomly corrupt at any time. I would highly advise you to upgrade to 2.4.36 before you lose your database.
--Quanah -- Quanah Gibson-Mount Architect - Server Zimbra, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration