Re: v2.2.24 structural object class modification not allowed

[Aleksandar Milivojevic <amilivojevic@pbl.ca>]

Michael Ströder wrote:
> Aleksandar Milivojevic wrote:
>
> > Althogh it would be violation of the standard, it might be usefull
> > feature in slapd to have run time option to allow addition/removals of
> > structural object classes.
>
> I disagree. We already have enough configuration options hard enough to
> explain.

It would be an rather easy to explain option.

> > The option would allow LDAP
> > administrator to restructure his objects (if/when needed) without the
> > need to dump/reload all entries in database.
>
> The administrator can simply delete the entry and re-add it with
> appropriate structural object class chain. This feature is not necessary.

Everyting can be done if you drop the database, and recreate it from 
scratch.  You can even do more drastic changes that way, like change 
database backend...  However, there are some issues with this.  First is 
the downtime.  Second is that dumping/readding entire database would 
probably have more severe impact on performance, then simply adding an 
attribute to existing object.  This may escalate if replication is also 
involved.  An simple change may escalate into something than needs very 
carefull planning.

Even if it needs to be done to the single entry (as opposed to the 
entire database), AFAIK you can't perform an atomic delete/add operation 
on an entry.  It seems that dash thing works only for modify changetype 
in LDIF.  I mostly access LDAP servers through various APIs, meaning my 
knowledge of command-line LDAP tools is somewhat limited.  So I've also 
looked at PHP API, and couldn't find any function that would allow 
atomic delete/add operation.  If it was possible, yeah, sure, it would 
be the right way to go.  And sure, I would be very happy and gratefull 
if somebody would tell me I was wrong, and that it is possible to 
perform this as an atomic operation (as long as he/she also tells me how 
to do it ;-).

--
Aleksandar Milivojevic <amilivojevic@pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7