Re: Upgrade Ubuntu server will purge OpenLDAP data

[Florian Weimer <fw@deneb.enyo.de>]

* Michael Ströder:

> Florian Weimer wrote:
>> * Onno van der Straaten:
>> 
>>> Ubuntu server upgrade from 12.04 to 14.04 LTS will purge the OpenLDAP
>>> directory data.
>> 
>> Is there an Ubuntu bug for this behavior?  It's a bit odd.
>
> One should generally be careful with system upgrades.
>
> AFAIK on-disk-format might change because of Berkeley-DB version upgrade.

Unless OpenLDAP uses the HASH database type, it's sufficient to
checkpoint the Berkeley DB environment (and perhaps some other
undocumented magic) *before* updating OpenLDAP.  The on-disk format of
B-Tree-type databases is quite stable.

(Automated dump and reload might not work for large databases during
automated package upgrades because of the time and disk space
overhead.)