[Samba] Win2K8 as DC in a samba4 environment

Iñigo Martinez Lasala imartinez at vector-ignite.com
Thu Jun 26 06:42:52 MDT 2014

Hi Andrew.

If we can contribute to enhance samba4 performance it would be great. 
Any tips?

Performance problem comes from some apps performing a lot of LDAP 
queries involving LDAP groups. Samba CPU usage reaches 100% easily. Two 
apps giving problems are Jira and Openfire (jabber server).

On 26/06/14 00:35, Andrew Bartlett wrote:
> On Wed, 2014-06-25 at 19:30 +0200, Iñigo Martinez Lasala wrote:
>> Good morning.
>> At this moment we run a samba4 domain with five linux DC under 4.1.7
>> version. However, due to some poor designed apps our LDAP is suffering a
>> lot of querys that raises CPU at 100% for minutes. Performance is poor
>> and we think that a native Windows native DC would not suffer this
>> problem due to a better index management and/or optimization at LDAP
>> service.
>> So, the question is, is it possible having a Win2K8 as a DC controller
>> in a samba4 environment? Is safe? Has anybody experienced with this
>> scenario?
> That should work fine, but it would be very worthwhile working out what
> calls are slow and why, so we can fix that as well.
> I can provide suggestions on how to get us the information we need if
> you wish to take that approach.  Essentially it involves (against a
> debug build of samba) using the linux 'perf' tools in -g mode, eg perf
> record -g and perf report -g.
> The only issue will be if workstations connect to the windows server,
> and look for sysvol, unless you work out a way to replicate that.
> Andrew Bartlett

Iñigo Martinez Lasala
Vector Ignite
Parque Empresarial Cerro de Los Gamos
Camino del Cerro de los Gamos, 1, Edificio 6, Planta 1
28224 Pozuelo de Alarcón - Madrid

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