[Samba] Re: Question about multiple ldap backend (as failover/load balance)

[Patrick Dung]

Correction there:

Corrected:
>Slave ldap server is required to add the 'updateref' directive which
tell others to make changes to other server(the master ldap server). It
cannot make changes to the current replica.

--- Patrick Dung <patrick_dkt at yahoo.com.hk> wrote:

> Hello
> 
> 1.
> OK, after searching, I found that openldap is a single master model.
> http://www.openldap.org/faq/data/cache/1240.html
> I think it will not change in foreseeable future.
> 
> In my previous mail, I said the ldap servers may be out of sync.
> But actually, under Openldap 2.3, it will not be the case.
> Slave ldap server is required to add the 'updateref' directive which
> refer all modifiy/update to the current replica.
> If 'updateref' directive is missing, the slave server refuse to make
> changes to the directory.
> 
> BTW, openldap 2.4 may have a new thing called mirror mode:
>
http://www.mail-archive.com/openldap-software@openldap.org/msg08188.html
> 
> 2.
> I found that Fedora DS can implement multi master mode.
>
http://directory.fedoraproject.org/wiki/FAQ#How_does_the_Fedora_Directory_Server_multi-master_replication_work.3F
> 
> With FDS, would samba be able to provide HA/multimaster AD?
> 
> Thanks
> Patrick
> 
> --- Patrick Dung <patrick_dkt at yahoo.com.hk> wrote:
> 
> > Hello
> > 
> > OK, in my case, there is only one samba server acting as PDC.
> > On the PDC, it has a openldap server as backend.
> > 
> > I have configured another server as the slave ldap server. slave
> ldap
> > server will pool data by syncrepl.
> > 
> > There are some spaces in samba/smbldap-tool that we can configure
> > multiple ldap servers (or load balance by use of DNS)
> > 
> > What happen if the PDC write data to the slave ldap server? (or the
> > master ldap server failed, data has to write to the slave ldap
> > server.
> > and then the master ldap server comes online)
> > 
> > The main problem is that the master and slave ldap server will be
> out
> > of sync. Can samba auto detect and fix it?
> > 
> > Thanks
> > Patrick
> > 
> > 
> >  
> >
>
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> 
>        
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